Video playing issue in my Ionic App on device

Recently, I have developed an Hybrid app which plays .mp4 videos from server. I faced several issues while playing the videos. For example. 1. MP4 videos were not optimized for web streaming. 2. I was using ol version VideoJS library to play the videos, which was causing the player to crash in background. Apart from that, I know various tweaks and tricks, which you can apply to fix your issue.