"The problem with viewing demonstrations such as shown in these video clips is that anyone wishing to fake it with their friends could reproduce something similar looking."
That's exactly right. There's no "falsifiability." All such demonstrations are deemed either f/actual or fraudulent. They do not "prove" anything, either way, regardless of the observer.
The way to approach that problem would be to show a "real" demonstration and compare it to one that was "fake." Explaining the differences and how they could be spotted would be helpful, especially to those who wised to understand/believe.
Without doubt, demonstrations such as these do not disprove anything. However, a disproof does not constitute a corresponding proof of anything. Demonstrating "how" something might be disproved, however, does constitute a "rtd" (reason to doubt).
Some would argue that that would be stronger than any appeal to experience. I.e., no matter what anyone has experienced, if it can be shown how that experience could be faked or the experiencer fooled, that is a reason to disbelieve.
DP suggested that a student could do X on his own to make Y occur. The only question is whether that would be possible, not DP's experience. I.e., are there examples available of students faking it? Or, would it be possible for students to fake it? --even if it could actually occur.
Well, in brief, how does one tell the difference between reality and illusion? What did Franklin say? “Believe none of what you hear and half of what you see.”
Let me add, though, the most ardent skeptics are also those who'd like to believe.