Thanks for posting! The following article may be helpful to you:
Media tiles include support for the following:
- MJPG, GIF, or streaming images
- JPG, PNG, and other static images
- Support for periodic refresh
- Adjustable tile size
Basically anything that works in a browser’s <img> tag.
The article also has tips on how to get some cameras connected including some workarounds for unsupported stream types. The beta also has experimental support for Nest Cams.
Edit:
Nest Cam and Nest Hello video doorbell experimental support is now available!