Recommend & Setup JavaScript-Based Video CMS

I need a headless or hybrid CMS, preferably JavaScript-based, to embed YouTube videos, iframe video embeds, and run overlay video ads. The CMS should already have a frontend.

Requirements:
- Setup on my server
- No PHP

Ideal Skills & Experience:
- Proficiency in JavaScript-based CMS
- Experience with video embedding and ad overlays
- Server setup and configuration