I'm having a really hard time understanding exactly what was done in that video. I'm less sure what the first part (before all the text) is showing, but even the second part leaves me with a few questions. Is it more clear to anything else? The idea seems good, just not described fully.
Part 2: They are trying to show that it might take 7 seconds at terminal velocity for the adhesive part of the gopro mount to give way when the only pull force is a standard size skydiving PC.- I f you cant manage to clear the snag yourself.
Part 1: I guess its a dramatisation. They shot some footage of how a cypress works for TV and used a Tandem cypress to shoot the footage. I guess they are showing a possible scenario for a reserve bridle- gopro snag after cypres activation. In that case 7 seconds would probably not be enough..
