How to save video and how to display the video using node js
Tell me more about what you are trying to accomplish. Where are your video files hosted? I actually wouldn’t recommend saving video files in a MongoDB database. Instead, I would recommend blob storage like S3, and you breaking up the file into chunks that can be streamed to your clients. There is a great walkthrough on how to do this here: Video Stream With Node.js and HTML5 | by Diogo Spínola | Better Programming
Let me know if you want me to clarify anything 
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