From my experience the RVX Builder (fork and upstream) are very buggy on Android, at least in Android I don't see why use it over Revancify.

I generally recommend the CLI for those that can use it as well.

I see, PvP you say, not often we see players wanting to play PvP haha, well for PvP it's not really available for Free Trial.

I suppose also opening the video file in the browser works for that?

https://github.com/inotia00/revanced-documentation

Try the other Methods in the ReVanced Extended documentation.

Using Revancify is a good option, or you can use the RVX-Builder in a computer.

FFXIV now (next patch) offers over half of the entire Main Story for free.

You can't go wrong and the community is the best around.