Can that synchronize as you film? Will your phone expose the temporary file to syncthing before the recording is over? Does it block anyone from deleting the file from the phone?

Lemmygrad is Lemmy

The voyager client has filters you could use to try and filter things out.

Alternatively, in a similar fashion. Use “hail” to auto pause any app you want so they don’t run in the background unintended.

https://f-droid.org/en/packages/com.aistra.hail/