[amiga386]

Modern video services perform multiple encodings with different codecs, bitrates and screen dimensions, and serve up the most appropriate format that the client device can decode. Youtube has hundreds of format variants:

https://gist.github.com/MartinEesmaa/2f4b261cb90a47e9c41ba11...

Devices with AV1 hardware decoding - rare as they are - won't be obsoleted for a long time.

[Gigachad]

Even devices that don't aren't becoming obsolete. My M1 macbook does not have a hardware decoder and youtube seems to choose AV1 whenever it's available. The software decoder does not noticeably warm the laptop.