Add support to show 16:9 (widescreen) thumbnails for videos (Possibly adding a setting for 16:9 or 4:3) about plugin.video.youtube

[anxdpanic]

https://github.com/jdf76/plugin.video.youtube/releases/tag/5.4.0 alpha3 adds choice in thumbnail size

[jonisb]

Thanks for adding the option, works great (tested on Kodi 16,1)

But I think adding the aspect ratio to the option text would be helpful, why would a user choose medium quality (unless their internet sucks) even though they might prefer to get widescreen thumbnails instead and sacrifice quality.

[anxdpanic]

Done