Some mp4 files open on Android tablet, others don't

[Deef Deefster]

Everything is installed correctly and I can launch files from my Android tablet on my PC.

However, mp4 files that I've created using Handbrake just won't play on the phone (I know it's in beta, so that might be it)? Other mp4 files launch on tablet fine.

I can't find anything similar anywhere, so thought I'd ask here. Any advice welcome!

Thanks!

[Deef Deefster]

I should point out that I'm using VLC for Android as the player on the tablet.