I made some tries to find out what the problem is:
I updated the latest moodle version,it has still no sound but finally i am able to use in full screen mode
But i find that the problem is not with moodle but with Chrome Android with native Lenovo browser i have well sound on the moodle course!
Hello All,
Could the dev team please update all on the current position on Mp4 video play on moodle mobile app.