Sync support for HEVC/x265, converting to x264 to then download (resolved with downloads feature)

[tom80H]

You might want to check out the new download feature (currently available for Android, coming soon to iOS). This should cover this suggestion.

Sync is Dead (almost). Long Live Downloads! (Android)

Hi all! We’ve been working on a major overhaul of our offline “Sync” capability in our mobile apps, and we’d like to invite you to try it out! The feature formerly known as “Sync” is now simply called Downloads, and for the most part it works the same way: take your favorite media with you to enjoy anywhere, no connection required. Some of the main advantages to the new Downloads include: Simplicity. Most things can be downloaded with a single tap. No fiddling with settings or item limits. (Y…

https://support.plex.tv/articles/downloads-overview/