

Ayaneo and GPD are too expensive for to be compared to consoles imo. They’ve been above a grand and in general similarly priced as a laptop with the same internal hardware. Edit: The Steam Deck basically halved the price for an powerful x86 handheld, and made it comparable to a Switch. This is imo the only reason it sells so well.
Unless you’ve downloaded remuxes (which I doubt), I’d seriously recommend redownloading instead of converting your existing files.
h.265 and especially AV1 take a long time to encode by CPU, and hardware encoding won’t give you any space savings, unless you’re okay with losing much details.
Redownloading is most definitely faster, will result in more space savings for the quality you’ll get. PS: Unless you’ve got data volume limits, but even then I’d recommend slowly upgrading over time. It’s quite simple with TRaSH guides and giving h.265 a higher score.