How to transmit playable video to the front end?

  node.js, question

My thinking is

<vedio src=’/xx/api’>

The back end transmits video file data (binary) to the front end, and then changes the corresponding header.
However, I did not succeed in my attempt, and I did not find any relevant information on the Internet.
I don’t know what the problem is.

Perhaps the desired effect is this  sc\u003d0743670c523be875\u0026br\u003d759\u0026vid\u003d2561631\u0026aid\u003d311\u0026area\u003dHT\u0026vst\u003d2

Video tags do not support FLASHVIDEO’s videos.