Only ran once, doesn’t measure x server cpu usage, claims “not necessarily more efficient” despite kwin and labwc showing higher framerate for seemingly similar power usage numbers, no discussion of e.g. frame times, consistency and cpu vs gpu limited…

As part of “Steam Play”, videos are re-encoded and downloaded to allow playback via proton in certain cases. On subsequent runs of the game, the video will likely work fine.

https://www.gamingonlinux.com/guides/view/why-some-games-on-linux-steamos-steam-deck-have-broken-videos-and-what-you-can-do/