I think it’d be a full screen ai client app running on linux, probably on cage. why bother with the nt and win32 and whatever middlewares. linux is externally maintained. saved dev money can be used for power/ram bills instead.

I’ve seen 10-12W easily on 4K for soc without av1. your soc (intel 11 gen) should support av1. try to play the video on mpv (with yt-dlp integration) with various hw acceleration options to see if it changes. probably your browser is software decoding.

for hardware decoding supported soc too I noticed 2-3W of extra power usage when playing youtube from website compared to mpv or freetube. the website seems doing inefficient js stuffs but I haven’t profiled it.