So oddly. I tried using udl helper to download the video and everything worked good

not run in FF82.0.2 (64 bit)

Sorry, seems to be a good addon, but at the moment it does not work. Does it for someone else ?
Can the developer give information please ?

im useing yet

good

only shows low res video's both mp4 and webm up to 360p including extremely small flv 144p and 240p
I understand 480p and 1080p are dash only but 720p should be available in both mp4 and webm (I tested it on new videos available in full HD)?
I'm running FF57 x64 on 7 x64

edit
I enabled DASH to see if google changed something and 720p was DASH only
sadly even with DASH enabled no HD video is available only up to 480p and I tested it on a 2k video

was working very well but doesn't work anymore since FF57 (W10 64bits)