I read good reviews of this app, decided to try it out, uploaded a test video from Photo Gallery, play from app, “no audio” but video is fine, Played same video from photos gallery & there is audio. Reached out to developer no response yet. If this one issue is fixed then it will be 5 star and will upgrade to Full version.
UPDATE: After trying multiple solutions/research, turn out solution was just simple. The vibration/silent button of iPhone have to be OFF to have sound. So changed this to 5 star.
Now, only worry I will have is for future, if the developer will continue updating this with iOS versions or will be discontinued supporting it.