Fix YouTube authors from playlists

[ccstan99]

Authors of YouTube videos from playlist in MySQL are showing up as the owner (or adder?) of the playlist. If possible, it would be more meaningful to have the owner of the channel that published the video. For example:

url	title	authors
https://www.youtube.com/watch?v=Zr97Cxso4W4	Stuart Armstrong - AI: Humanity's Endgame?	plex / Eric
https://www.youtube.com/watch?v=Zef-mIKjHAk	The AI revolution and international politics | Allan Dafoe | EAG 2017 Boston	plex / Eric
https://www.youtube.com/watch?v=zc4gKH6xTBw	Could you Stop a Super Intelligent AI?	plex / Eric
https://www.youtube.com/watch?v=z6atNBhItBs	The Alignment Problem: Machine Learning and Human Values with Brian Christian	plex / Eric
https://www.youtube.com/watch?v=yl2nlejBcg0	Vael Gates: Researcher Perceptions of Current and Future AI	plex / Eric
https://www.youtube.com/watch?v=YkEF3FovtbY	Oxford professor on Transcendence: how could you get a machine intelligence?	plex / Eric
https://www.youtube.com/watch?v=YeHNWKyySaI	Stuart Russell - Clarifying AI Alignment	plex / Eric
https://www.youtube.com/watch?v=xLYE11yW-hQ	Should We Build Superintelligence?	plex / Eric