I just heard YouTube has been so overwhelmed they reduced all playbacks to SD.. you can still manually click back to HD.. just a heads up if you like the best pic you can get.
Also, don't forget your favorite band probably has videos on YT.
I've been watching some great live performances by the Mothers of Invention back in the day.. there's a lot of full concerts that go for 2 or more hours.
And hey, wanna see the most relaxed Bob DYLAN ever? This concert video is over 2 hours, people are coming up on stage to dance, high five, shake hands and kiss DYLAN, he's takes it all in with a smile and keeps on playing.. video not that great, shot by a fan.
https://www.youtube.com/watch?v=EHw_VkCfsTQ&t=1s