Thank you for sharing this experience. FFM's have major safety downsides, especially with poor or no training. I am assuming you are one of the two divers in the video, please correct me if I'm wrong. I have a couple questions for my own education, I would appreciate your perspective if you don't mind.
What upsides do a FFM have for this sort of diving? I didn't hear the divers in the video speaking to each other, but maybe that's an artifact of the recording.
Was the buddy using a FFM as well, a standard OC reg/octo setup, or something else?
In the video, it looks like the diver had either a flood, or a failure to deliver gas (valve off, reg broken, something like that). What was the initial issue that the diver faced?
Once that issue occurred, the diver removed the FFM and performed a CESA ascent (the ascent was pretty fast, but you can see them continue to exhale as they go up). Was this the best solution to the problem?
Thanks again. Cheers.