Add the amp-embed tag.
Add the amp-embed tag.

See https://github.com/ampproject/amphtml/pull/1607
I copied over from amp-ad, then edited name and comment.
Also placed a hint that they should be changed together.

Mixpo/amphtml,triplelift/amphtml,gumgum/amphtml,DAC-f1h-dev/amphtml,nathangoulding/amphtml,Re-lM/amphtml,interspacejp/amphtml,galeksic/amphtml,rlugojr/amphtml,arealit/amphtml,chaveznvg/amphtml,avimehta/amphtml,dotandads/amphtml,sortable/amphtml,ecoron/amphtml,laterpay/amphtml,chaveznvg/amphtml,amoad-amoe/amphtml,cory-work/amphtml,zhucl/amphtml,Lith/amphtml,zhucl/amphtml,bpaduch/amphtml,spotxchange/amphtml,lannka/amphtml,triplelift/amphtml,lannka/amphtml,jridgewell/amphtml,yieldbot/amphtml,Adtoma/amphtml,nexxtv/amphtml,devjsun/amphtml,DistroScale/amphtml,BrightcoveOS/amphtml,alanorozco/amphtml,jridgewell/amphtml,vmarteev/amphtml,clawr/amphtml,interspacejp/amphtml,yieldbot/amphtml,erwinmombay/amphtml,ADITION/amphtml,gumgum/amphtml,nexxtv/amphtml,keithwrightbos/amphtml,ruturajv-media-net/amphtml,voyagegroup/amphtml,wjfang/amphtml,adtechnology/amphtml,kixer-com/amphtml,Mixpo/amphtml,kamtschatka/amphtml,mlb7687/amphtml,nexxtv/amphtml,src-code/amphtml,camelburrito/amphtml,DarXector/amphtml,donttrustthisbot/amphtml,yieldmo/amphtml,rifler/amphtml,koshka/amphtml,jpettitt/amphtml,sortable/amphtml,BenDz/amphtml,ampproject/amphtml,lannka/amphtml,mkhatib/amphtml,kmh287/amphtml,wjfang/amphtml,pedjoni8/amphtml,luciancrasovan/amphtml,media-net/amphtml,camelburrito/amphtml,sharethrough/amphtml,engtat/amphtml,loic-seguin/amphtml,JuliusThms/amphtml,taboola/amphtml,yevheniiminin/amphtml,prateekbh/amphtml,wjfang/amphtml,wjfang/amphtml,interspacejp/amphtml,vmarteev/amphtml,sriramkrish85/amphtml,adiant/amphtml,tlong2/amphtml,cvializ/amphtml,jdelhommeau/amphtml,aghassemi/amphtml,JuliusThms/amphtml,clawr/amphtml,Meggin/amphtml,clawr/amphtml,ericlindley-g/amphtml,sortable/amphtml,bpaduch/amphtml,src-code/amphtml,laterpay/amphtml,yevheniiminin/amphtml,sortable/amphtml,prateekbh/amphtml,nekodo/amphtml,clawr/amphtml,ADITION/amphtml,ruturajv-media-net/amphtml,voyagegroup/amphtml,yandex-pcode/amphtml,media-net/amphtml,keithwrightbos/amphtml,burtcorp/amphtml,keithwrightbos/amphtml,Mobusi-ads/amphtml,mhc-gh/amphtml,burtcorp/amphtml,comScore/amphtml,arealit/amphtml,dvoytenko/amphtml,yieldbot/amphtml,arealit/amphtml,ruturajv-media-net/amphtml,pedjoni8/amphtml,mhc-gh/amphtml,honeybadgerdontcare/amphtml,nekodo/amphtml,comScore/amphtml,sklobovskaya/amphtml,lannka/amphtml,clawr/amphtml,Meggin/amphtml,sharethrough/amphtml,simplereach/amphtml,lzanol/amphtml,camelburrito/amphtml,burtcorp/amphtml,ADITION/amphtml,avimehta/amphtml,koshka/amphtml,adiant/amphtml,Adtoma/amphtml,rsimha-amp/amphtml,britice/amphtml,aghassemi/amphtml,BrightcoveOS/amphtml,AaronCritchley/amphtml,spotxchange/amphtml,ericlindley-g/amphtml,nexxtv/amphtml,adup-tech/amphtml,yieldbot/amphtml,engtat/amphtml,rsimha-amp/amphtml,dvoytenko/amphtml,zhouyx/amphtml,danielrozenberg/amphtml,jmadler/amphtml,BenDz/amphtml,donttrustthisbot/amphtml,DistroScale/amphtml,vmarteev/amphtml,zhangsu/amphtml,kixer-com/amphtml,arealit/amphtml,rifler/amphtml,fullspeed-sp/amphtml,prateekbh/amphtml,adiant/amphtml,DAC-f1h-dev/amphtml,fullspeed-sp/amphtml,chaveznvg/amphtml,jmadler/amphtml,Adtoma/amphtml,shawnbuso/amphtml,ericlindley-g/amphtml,smartadserver/amphtml,criteo-forks/amphtml,loic-seguin/amphtml,taboola/amphtml,tdrl/amphtml,rlugojr/amphtml,techhtml/amphtml,rajkumarsrk/amphtml,zhangsu/amphtml,voyagegroup/amphtml,Gregable/amphtml,Adtoma/amphtml,jpettitt/amphtml,alanorozco/amphtml,galeksic/amphtml,lzanol/amphtml,avimehta/amphtml,honeybadgerdontcare/amphtml,BrightcoveOS/amphtml,powdercloud/amphtml,jpettitt/amphtml,DarXector/amphtml,jlucero-contentad/amphtml,galeksic/amphtml,sebastianbenz/amphtml,dvoytenko/amphtml,tlong2/amphtml,rsimha-amp/amphtml,galeksic/amphtml,gumgum/amphtml,ampproject/amphtml,rsimha-amp/amphtml,spotxchange/amphtml,yandex-pcode/amphtml,jmadler/amphtml,zhangsu/amphtml,donttrustthisbot/amphtml,DarXector/amphtml,britice/amphtml,DarXector/amphtml,devjsun/amphtml,ColombiaAnalytics/amphtml,sklobovskaya/amphtml,vmarteev/amphtml,fullspeed-sp/amphtml,shawnbuso/amphtml,criteo-forks/amphtml,DAC-f1h-dev/amphtml,cory-work/amphtml,Mobusi-ads/amphtml,wjfang/amphtml,sriramkrish85/amphtml,zhucl/amphtml,pietergreyling/amphtml,NataliaLKB/amphtml,simplereach/amphtml,Gregable/amphtml,koshka/amphtml,jasti/amphtml,tdrl/amphtml,kixer-com/amphtml,mhc-gh/amphtml,yandex-pcode/amphtml,jmadler/amphtml,cvializ/amphtml,jlucero-contentad/amphtml,dotandads/amphtml,alanorozco/amphtml,ecoron/amphtml,luciancrasovan/amphtml,donttrustthisbot/amphtml,kmh287/amphtml,camelburrito/amphtml,voyagegroup/amphtml,fullspeed-sp/amphtml,fullspeed-sp/amphtml,adup-tech/amphtml,adup-tech/amphtml,kamtschatka/amphtml,yieldbot/amphtml,ColombiaAnalytics/amphtml,src-code/amphtml,ecoron/amphtml,clawr/amphtml,sebastianbenz/amphtml,voyagegroup/amphtml,adup-tech/amphtml,engtat/amphtml,smartadserver/amphtml,rlugojr/amphtml,DistroScale/amphtml,ecoron/amphtml,engtat/amphtml,loic-seguin/amphtml,rlugojr/amphtml,mlb7687/amphtml,mhc-gh/amphtml,nexxtv/amphtml,engtat/amphtml,techhtml/amphtml,zhucl/amphtml,nexxtv/amphtml,danielrozenberg/amphtml,vmarteev/amphtml,AaronCritchley/amphtml,danielrozenberg/amphtml,britice/amphtml,yevheniiminin/amphtml,Mixpo/amphtml,jlucero-contentad/amphtml,zhucl/amphtml,jpettitt/amphtml,smartadserver/amphtml,yevheniiminin/amphtml,sriramkrish85/amphtml,BenDz/amphtml,nexxtv/amphtml,chaveznvg/amphtml,techhtml/amphtml,spotxchange/amphtml,mkhatib/amphtml,jlucero-contentad/amphtml,alanorozco/amphtml,criteo-forks/amphtml,dotandads/amphtml,pedjoni8/amphtml,ampproject/amphtml,tdrl/amphtml,jridgewell/amphtml,yandex-pcode/amphtml,burtcorp/amphtml,sriramkrish85/amphtml,bpaduch/amphtml,ruturajv-media-net/amphtml,ericlindley-g/amphtml,interspacejp/amphtml,mlb7687/amphtml,NataliaLKB/amphtml,AaronCritchley/amphtml,danielrozenberg/amphtml,laterpay/amphtml,gumgum/amphtml,jmadler/amphtml,taboola/amphtml,rsimha-amp/amphtml,ithinkihaveacat/amphtml,NataliaLKB/amphtml,burtcorp/amphtml,donttrustthisbot/amphtml,sebastianbenz/amphtml,BenDz/amphtml,yevheniiminin/amphtml,Mobusi-ads/amphtml,tdrl/amphtml,pedjoni8/amphtml,jlucero-contentad/amphtml,Lith/amphtml,DarXector/amphtml,Mobusi-ads/amphtml,cory-work/amphtml,erwinmombay/amphtml,danielrozenberg/amphtml,clawr/amphtml,zhouyx/amphtml,gumgum/amphtml,widespace-os/amphtml,BenDz/amphtml,ColombiaAnalytics/amphtml,prateekbh/amphtml,tdrl/amphtml,triplelift/amphtml,comScore/amphtml,adtechnology/amphtml,koshka/amphtml,BenDz/amphtml,ColombiaAnalytics/amphtml,adiant/amphtml,alanorozco/amphtml,powdercloud/amphtml,camelburrito/amphtml,rajkumarsrk/amphtml,adtechnology/amphtml,techhtml/amphtml,adup-tech/amphtml,zhouyx/amphtml,jridgewell/amphtml,engtat/amphtml,taboola/amphtml,JuliusThms/amphtml,JuliusThms/amphtml,mhc-gh/amphtml,media-net/amphtml,yandex-pcode/amphtml,kmh287/amphtml,widespace-os/amphtml,rsimha-amp/amphtml,shawnbuso/amphtml,BenDz/amphtml-atinternet,sebastianbenz/amphtml,ecoron/amphtml,nathangoulding/amphtml,Re-lM/amphtml,arealit/amphtml,adiant/amphtml,loic-seguin/amphtml,nathangoulding/amphtml,yieldmo/amphtml,keithwrightbos/amphtml,zhouyx/amphtml,lzanol/amphtml,dotandads/amphtml,vmarteev/amphtml,ruturajv-media-net/amphtml,Mixpo/amphtml,lzanol/amphtml,powdercloud/amphtml,yieldmo/amphtml,src-code/amphtml,Gregable/amphtml,DarXector/amphtml,cory-work/amphtml,arealit/amphtml,honeybadgerdontcare/amphtml,voyagegroup/amphtml,yandex-pcode/amphtml,ampproject/amphtml,aghassemi/amphtml,zhangsu/amphtml,src-code/amphtml,jridgewell/amphtml,yevheniiminin/amphtml,mlb7687/amphtml,plista/amphtml,triplelift/amphtml,jdelhommeau/amphtml,jridgewell/amphtml,wjfang/amphtml,JuliusThms/amphtml,prateekbh/amphtml,vmarteev/amphtml,shawnbuso/amphtml,kixer-com/amphtml,cvializ/amphtml,burtcorp/amphtml,devjsun/amphtml,lannka/amphtml,jdelhommeau/amphtml,shawnbuso/amphtml,AaronCritchley/amphtml,pedjoni8/amphtml,honeybadgerdontcare/amphtml,shawnbuso/amphtml,ADITION/amphtml,pietergreyling/amphtml,aghassemi/amphtml,cory-work/amphtml,mkhatib/amphtml,devjsun/amphtml,spotxchange/amphtml,mlb7687/amphtml,bpaduch/amphtml,sortable/amphtml,amoad-amoe/amphtml,danielrozenberg/amphtml,rajkumarsrk/amphtml,BrightcoveOS/amphtml,jasti/amphtml,sriramkrish85/amphtml,BenDz/amphtml-atinternet,media-net/amphtml,src-code/amphtml,sklobovskaya/amphtml,media-net/amphtml,fullspeed-sp/amphtml,Gregable/amphtml,cory-work/amphtml,rajkumarsrk/amphtml,chaveznvg/amphtml,tlong2/amphtml,Meggin/amphtml,sharethrough/amphtml,jpettitt/amphtml,taboola/amphtml,mhc-gh/amphtml,smartadserver/amphtml,jpettitt/amphtml,rlugojr/amphtml,Lith/amphtml,luciancrasovan/amphtml,Mobusi-ads/amphtml,plista/amphtml,BenDz/amphtml-atinternet,cvializ/amphtml,media-net/amphtml,pietergreyling/amphtml,widespace-os/amphtml,lannka/amphtml,mhc-gh/amphtml,honeybadgerdontcare/amphtml,camelburrito/amphtml,widespace-os/amphtml,ADITION/amphtml,adiant/amphtml,zhouyx/amphtml,nekodo/amphtml,alanorozco/amphtml,amoad-amoe/amphtml,jasti/amphtml,Lith/amphtml,alanorozco/amphtml,ecoron/amphtml,taboola/amphtml,techhtml/amphtml,amoad-amoe/amphtml,taboola/amphtml,ericlindley-g/amphtml,erwinmombay/amphtml,JuliusThms/amphtml,mkhatib/amphtml,luciancrasovan/amphtml,zhouyx/amphtml,cory-work/amphtml,zhucl/amphtml,pietergreyling/amphtml,koshka/amphtml,aghassemi/amphtml,donttrustthisbot/amphtml,jdelhommeau/amphtml,jdelhommeau/amphtml,Gregable/amphtml,gumgum/amphtml,Lith/amphtml,DAC-f1h-dev/amphtml,gumgum/amphtml,camelburrito/amphtml,DAC-f1h-dev/amphtml,rifler/amphtml,comScore/amphtml,jmadler/amphtml,zhucl/amphtml,devjsun/amphtml,DistroScale/amphtml,BrightcoveOS/amphtml,tlong2/amphtml,kmh287/amphtml,dotandads/amphtml,kamtschatka/amphtml,mlb7687/amphtml,yieldmo/amphtml,jasti/amphtml,honeybadgerdontcare/amphtml,sklobovskaya/amphtml,pedjoni8/amphtml,amoad-amoe/amphtml,adup-tech/amphtml,sklobovskaya/amphtml,sortable/amphtml,kamtschatka/amphtml,Adtoma/amphtml,yieldbot/amphtml,honeybadgerdontcare/amphtml,comScore/amphtml,jpettitt/amphtml,avimehta/amphtml,keithwrightbos/amphtml,kixer-com/amphtml,sharethrough/amphtml,ericlindley-g/amphtml,pietergreyling/amphtml,ampproject/amphtml,jpettitt/amphtml,keithwrightbos/amphtml,Gregable/amphtml,dvoytenko/amphtml,devjsun/amphtml,keithwrightbos/amphtml,kamtschatka/amphtml,avimehta/amphtml,kixer-com/amphtml,ithinkihaveacat/amphtml,tlong2/amphtml,rifler/amphtml,rajkumarsrk/amphtml,rsimha-amp/amphtml,jdelhommeau/amphtml,bpaduch/amphtml,smartadserver/amphtml,koshka/amphtml,sebastianbenz/amphtml,luciancrasovan/amphtml,jlucero-contentad/amphtml,ithinkihaveacat/amphtml,luciancrasovan/amphtml,powdercloud/amphtml,DistroScale/amphtml,Adtoma/amphtml,NataliaLKB/amphtml,luciancrasovan/amphtml,rlugojr/amphtml,plista/amphtml,pietergreyling/amphtml,yieldmo/amphtml,criteo-forks/amphtml,Re-lM/amphtml,erwinmombay/amphtml,shawnbuso/amphtml,DAC-f1h-dev/amphtml,yandex-pcode/amphtml,kixer-com/amphtml,jridgewell/amphtml,Mobusi-ads/amphtml,bpaduch/amphtml,spotxchange/amphtml,mhc-gh/amphtml,DistroScale/amphtml,mkhatib/amphtml,prateekbh/amphtml,sebastianbenz/amphtml,engtat/amphtml,ruturajv-media-net/amphtml,nekodo/amphtml,rifler/amphtml,danielrozenberg/amphtml,lzanol/amphtml,BrightcoveOS/amphtml,dvoytenko/amphtml,kmh287/amphtml,jasti/amphtml,alanorozco/amphtml,ampproject/amphtml,laterpay/amphtml,cvializ/amphtml,powdercloud/amphtml,zhouyx/amphtml,nathangoulding/amphtml,powdercloud/amphtml,Gregable/amphtml,jasti/amphtml,sharethrough/amphtml,prateekbh/amphtml,laterpay/amphtml,aghassemi/amphtml,bpaduch/amphtml,rifler/amphtml,powdercloud/amphtml,dvoytenko/amphtml,sriramkrish85/amphtml,widespace-os/amphtml,Mixpo/amphtml,adiant/amphtml,criteo-forks/amphtml,mkhatib/amphtml,comScore/amphtml,adtechnology/amphtml,tdrl/amphtml,yieldmo/amphtml,AaronCritchley/amphtml,laterpay/amphtml,kmh287/amphtml,Gregable/amphtml,rajkumarsrk/amphtml,yieldmo/amphtml,cvializ/amphtml,ampproject/amphtml,erwinmombay/amphtml,kamtschatka/amphtml,interspacejp/amphtml,britice/amphtml,sharethrough/amphtml,rajkumarsrk/amphtml,zhangsu/amphtml,arealit/amphtml,voyagegroup/amphtml,media-net/amphtml,donttrustthisbot/amphtml,simplereach/amphtml,ampproject/amphtml,media-net/amphtml,AaronCritchley/amphtml,comScore/amphtml,adtechnology/amphtml,plista/amphtml,lzanol/amphtml,triplelift/amphtml,smartadserver/amphtml,lannka/amphtml,Lith/amphtml,sklobovskaya/amphtml,ithinkihaveacat/amphtml,avimehta/amphtml,criteo-forks/amphtml,tlong2/amphtml,techhtml/amphtml,triplelift/amphtml,zhangsu/amphtml,sklobovskaya/amphtml,dotandads/amphtml,chaveznvg/amphtml,erwinmombay/amphtml,wjfang/amphtml,Re-lM/amphtml,galeksic/amphtml,interspacejp/amphtml,widespace-os/amphtml,Mixpo/amphtml,amoad-amoe/amphtml,adtechnology/amphtml,danielrozenberg/amphtml