Yes; that video is a bit of a joke. I suspect the idea was that it would "reassure" those watching that all will be well on the battlefield (some hope). Also, where's the "genny" (engine-driven power generator)?*
It reminds me of a film (in glorious "Technicolor") produced by the US Army showing actual battle casualties undergoing surgery in a MASH type field (tented) hospital in Vietnam. Although supposedly also intended to "reassure", it was in fact so gory that I had to leave the room to spare myself the embarrassment of "losing my lunch".
About x-ray tubes ... yes, in fundamental terms they haven't really changed that much since the introduction of the rotating anode. Despite what many folk these days apparently believe, you can't really change the laws of physics (cue Scotty in Star Trek).
By the way, I have also seen "flash-over" in tubes, as well as along HT cables. Perhaps we should remind folk that HV is dangerous stuff. It can kill if you're not careful, and it's us folk (the engineering techs) who are often around when things go wrong.
It's not usually so bad if you are resident at a single hospital (or group of hospitals) as you get to know the machines. It is when you are called to a remote location having never seen the machine before that things can get a little "hair raising". OK, you can (and should) "proceed with caution", but at some stage you have to press that exposure button!
* But that's a nice shot of the half-track right at the beginning. The REME (maintenance and repair Corps of the British Army) used a version of those (maybe the M5 variant) right up into the late 1960's. They were modified with a crane jib on the front (for lifting tank engines and what-have-you). There was even a Dinky toy at one time! See Google for details:- "reme halftrack".
