[caeruleus]

AFAIK you have to select DASH as your preferred video quality (or append &quality=dash) for other resolutions to work. It's not enabled by default because the server has to proxy the video (CORS):

https://github.com/iv-org/invidious/issues/177#issuecomment-...

[aitchnyu]

Thanks, pruned my list to instances that allow DASH.