My best guess is that they are on a 0 gravity plane ride where the plane accelerates down at 9.8 m/s giving the illusion of being weightless.
Time to get the calculator out. Good thing this ancient thing is solar powered.
Right, so the video is 50 mins long (3000 seconds), falling at a rate of 9.8m/s/s...
so, assuming they were falling at rest at the start (instantly shooting to 9.8m/s/s)...
distance is 1/2 acceleration times time times time...
So, 4.9m/s/sx3000sx3000s gives us 44,000 km of falling.
Wait. How high is the ISS... 408km. They would have to be 100 times higher than the ISS to pretend be as high as the ISS.
We get into more problems when we consider that the FE Moon/Sun are 4828 km up. Why not land on the moon?
Wait. I realised they can do it in edits. Which now forces me to watch the whole thing to check for those (not a complete loss, not seen the inside of the ISS before).
There's a cut at 1:06... I'm at 24mins and I realized that the chunks need to be less than 5mins to be higher than ISS.
Cuts again at 28:08.
Curvature of the earth at 28:50 (can see my house from here)
Cut at 42:23
so, 3 cuts. In chunks: 1 min 6 seconds, 27 mins 2 seconds, 14 mins 15 seconds and 7 mins 58 seconds (give or take 2 seconds).
Only the first chunk would be workable. But your idea was still better than my underwater one. Touche