What about video support in your app?

Are you sure this is a new application?

What about the simplest and most understandable application for beginners, this is the PWA app Pinafore.

For those who have used third-party applications for Reddit, such as Infinity and Boost, Pinafore will be quite comfortable.

The last activity on the page was many months ago.
On their website page 404

And where can I find the compiled installation files?

It looks good, in the style of email apps.
The style of the instance is good, too.