Why this obsession with video? CT-ers seem to expect everything to be on the internet in the form of a video. I don't think any lab work I have ever done has ever been videoed - the recording took the form of my lab books & write-ups. Okay, so my specialism isn't engineering, but is video really a "scientifically honest" method of "proof" (proofs are only for mathematicians, Neil!) as Neil insists? I don't think so.
Furthermore, what would Neil expect to see when watching the equipment working in a vacuum chamber, on video or in real life? How would he know it was working? My guess is it would be handwaved away...
Because they don't have to think as hard.
There is a similar discussion over at ATS involving turbonium, well known to many here, who is demanding video footage of the testing of Apollo suit gloves to prove they were capable of being pressurised and then function properly. It's mostly a diversion from having his ass handed to him for posting one of archangel4mike's stupid videos about John Young not wearing gloves.
It's exactly the same premise as the tactic being employed here: find a topic for which the HB believes there is no evidence and keep gnawing at it in the hope that your detractors will go away. He can't prove that the gloves don't work, but he can prove that there is no video of them being tested (or believes he can). It's a scam to try and accumulate a series of small 'victories' and "A-ha! So you admit..." moments that they hope will add up to some sort of aggregate proof.
Another poster there had a similar thing over photos of crew members in the CSM in Apollo 12. He found that there were none, and decided that was all the proof he needed. The fact that 16mm footage of the crew in the CSM in zero G was available, as well as reflections of crew members in the window while filming the moon, was not of interest to him: there were no tourist "Hey ma look at me" images, ergo proof.
They don't want an answer, they want there not to be an answer. As with our OP here, they don't necessarily believe the argument, they believe that the other person can't provide a counter.