Video Direction

"Could someone use that video to show (convincingly?) that perpetual motion machines of the second kind are impossible?"

Yes: it will show how and why the ball will eventually stop bouncing. Will it convince over-unity believers? No, because either these guys are mentally-deficient crackpots who believe benign aliens will come down to Earth to save us from ourselves or some other similar nonsense, or they're scammers who prey on well-meaning people's worries.

"convincingly?"

That would be just another form of video trickery, the easiest of all. People see what they want to see, and believe what.... well...you know what I mean.

That would be an interesting experiment though. Simple, elegant actually. Interview participants before, and after. Do you think you would change anyone's mind? Or am I totally missing the point.

I will disappoint you but according to last experiences we had on this forum it is not worthwhile to invest effort and time and brain to convince people who do not want to be convinced. I would not go so far and consider them as crackpots, I would more pity them since they invest -mostly due to lack of knowledge- their creativity in directions without any opening. Their creativity which was proven in some apparently complex but in fact simple problems makes them be overconfident and even despise the scientists who do not do enough to discover the "twist". I noticed several times that as soon as one will manifest curiosity ask questions the discussion is changed and the interested one is under fire. The best example I got about a week ago. I dared ask if a claimed project was on stall or did progress. Immediately I was taught that without any experiment I should not dare criticise. in fact I did not, I only wanted to have news.

Those, let us say, "dreamers" do not want to open eyes, they continue to follow their dreams. I think that some where they are afraid of having the delusion to invest themselves to a null result.

No chance to convince them, I gave up.