youtube: update to v3 API (old API is deprecated)
youtube: update to v3 API (old API is deprecated)

This requires a Google API Key with Youtube read permissions enabled.

callumhogsden/ausbot,ddwo/nhl-bot,df-5/skybot,rmmh/skybot,parkrrr/skybot,Jeebeevee/DouweBot_JJ15,TeamPeggle/ppp-helpdesk,olslash/skybot,Jeebeevee/DouweBot,Teino1978-Corp/Teino1978-Corp-skybot,crisisking/skybot,SophosBlitz/glacon,jmgao/skybot