That is weird. On .ml and .world, clicking the thumbnail opens the streamable link in a new tab for me, but on ani.social and sopuli.xyz, the video downloads.

Tested on Firefox and Chromium on Debian so it might not be a browser issue. Same behavior with Chromium on Windows so it’s not an OS thing. I don’t know what’s causing it to be honest.

Also, the embedded video is a catbox link.