I convert much to 720p PS3 compliant H264, for maximum device compatibility. I take an external drive with these files with me when I travel, and in 99% of the cases plugging it into hotel TVs just works.
I only play these files on my second monitor as background noise when I'm coding boring stuff. Day of The Dead is 696MB, and looks great on my monitor. https://files.catbox.moe/cm88w0.jpg I don't need more for this use case. 577 movies so far, at 466GB! God bless the AV1 team!
He he, I have a secret aversion to movies exceeding 1GB :) I know what you mean! I wonder what video fidelity I would gain moving to something more modern. It's just really convenient being able to playback anywhere.