clean: remove old pre-prod branching from playem-youtube-iframe-patch.js + add comments to explain local/prod branching
clean: remove old pre-prod branching from playem-youtube-iframe-patch.js
+ add comments to explain local/prod branching

openwhyd/openwhyd,openwhyd/openwhyd,openwhyd/openwhyd,openwhyd/openwhyd,openwhyd/openwhyd