Video from the server is not playing, why?

Question

HTML

Hello. I need to embed the video on the site.
HTML:

<video id="video_background" autoplay="" loop="loop" preload="auto" muted="">
    <source src="/video/video.mp4" type="video/mp4">
</video>

Through css everything is stretched. On the local server, everything works, reproduced as it should. I upload to heroku, it stops working. You click on the video through the developer panel, the black screen is the video control panel but it does not play. If you upload the video somewhere and insert a direct link - it works. What can be wrong?

Answer 1

what is written in the logs?

Answer 2

The Heroku platform is designed to store code first and foremost. And for files, it's better to use some CDN like CloudFlare.