I only watched that part with the bulb. I'm impressed with Googles search engine. I would assume in this case what they show is indeed real. You could try the same sort of experiment using higher voltages and going outside the bulb easy enough. If you use an ignition coil, you may want to add some sort of clamp to protect the scope.
Yes, google searches, can be amazing at times. E.g. You remember something, from many decades ago, so you type in a few words, describing it, and the concept. In the belief, that it almost certainly, won't find it or even something remotely similar, then it finds it!
E.g. I was looking for details on this mega rare computer (or computer like), thing, that was a one off project, built by some hobbyists (Electronics), who I might have known/met, a very long time ago. Hobbyist, and relatively low key.
So, not a chance in a million years, that I'd find it, but I tried, anyway.
Amazingly (because I could tell the search the exact area, and other specific details), it found it. In an ancient copy of a local newspaper, to that area, an embarrassingly long time ago, longer than you might think (> decades and decades). Which had a brief (but quite detailed), article, about it.
I'm more interested, in using them as novelty 'valve/tube' rectifiers/diodes. As it seems fascinating to use a cheap (I hope I can still get them cheaply), automotive car brake/rear light, bulb. With two filaments, and vacuumed, rather than gas filled version.
But yes, I'd want to use an old/unimportant scope, protected (i.e. high voltage, if I have them) scope probe(s) and clamp or stuff, to protect the scope. Possibly not all the things I just listed, but at least enough, to feel confident, the scope won't get destroyed.