How to use animated battlemaps in Roll20?
Added 2021-09-03 12:41:07 +0000 UTCHere is simple tutorial:
1) Install VTT Enhancement Suit addon to your browser. I recommend to use Firefox (https://addons.mozilla.org/en-US/firefox/addon/roll20-enhancement-suite/), but you can try to install addon to Chrome, it's a bit more complicated (https://justas-d.github.io/roll20-enhancement-suite/chrome.html). Then tell to your players to install it too.

2) Open Dropbox folder with needed map, then get a shareable link to the video (right-click -> "Copy link").

3) Now change the link a little, replace 0 at the end with 1. For example:
turns into
4) Paste the link into the Roll20 Animated Background Setup -> Media URL (the orange film icon at the top of the Roll20 map area). Don't forget to check "Enabled" checkbox and click OK.

That's all! Enjoy your fantastic games!