Technically, the internet already has what you’re looking for. It’s just not really standardized for video media.

The beginning of the URL or the schema is already able to on most mainstream OS be controlled by a specific application.

There’s nothing really stopping anyone from making it so there’s a video:// schema, and then configuring a schema handler to handle it. on Debian it would be a single desktop file with a MimeType=x-scheme-handler/video line indicating that type of url should be opened with that desktop file. I had to configure it for vortex to get it to open mod links, I never knew how easy that was