Planning to film ICE? Wired has a guide for that: https://www.wired.com/story/how-to-film-ice/
How to Film ICE

Filming federal agents in public is legal, but avoiding a dangerous—even deadly—confrontation isn’t guaranteed. Here’s how to record ICE and CBP agents as safely as possible and have an impact.

WIRED
@evacide I think I would add one thing that I didn’t see mentioned. It seems that ICE are snatching phones out of people’s hands, in which case your recording goes away. That’s mitigated by the fact that there are lots of people recording. Even so, if you’re paranoid (and I think you should be), consider just facetiming with a trusted friend who is somewhere else, and have them do the recording. Phone gets snatched, or God forbid you get shot, that record still exists.
@UweHalfHand @evacide AIUI some live-streaming also preserves the video, as well as providing realtime information, tho I don’t know what’s involved in making sure someone else has access to your account in case you get abducted