Hey, you are trying to play a DRM-protected video without passing the tokens to the player.
For the player to decrypt the video it needs tokens which you can generate on your backend server and pass to the front end via an Ajax request or on page load depending on your technology stack.
You can refer to this doc DRM which explains what DRM is and how you can implement it. It also has code snippets to make your integration faster and easier.
Additionally, here is the webinar conducted by our team on this topic: Gumlet Webinar: How to protect your videos: DRM and more
Do let me know if you need help.
Thanks