The ONLY app that works absolutely perfectly is KODI. I’ve been using the KODI Leia version and instant happiness was finally home.
KODI has:
- no video lagging
- no video stuttering
- no desynced audio
- nothing wrong at all
What is more, you can setup an optional audio delay by default in case your bluetooth speakers exhibit a delay issue! Set up the delay once, check the make it default box, and all your videos will play in perfect sync with your speaker without having to go in the settings every time.
FYO, the next best is VLC, although the latter did exhibit either playback issues or codec incompatibility most of the time. The rest of the apps that have been mentioned here or that I dug in the play store are even worse than VLC. Just go with KODI and don’t look back.