

I think you mean the standard for professionals. And it was not Betamax but Betacam that was an overwhelming standard for professionals because it qualified as broadcast quality.
But Betacam was also made by Sony, and used similar technologies to Betamax, but they were no compatible.
I am not aware that any of the DVCPRO formats were ever a similar major standard for professionals. In fact this is the first time I ever heard of it, but I lost contact with the industry, so I may just be ignorant about it.










That’s a straw man argument, because that is not at all what is happening.
There are several factors, first the visible evidence of IV, then the MRI scans, which are used to monitor the effect of the treatment. Then multiple symptoms Trump is showing, like fatigue and dementia, some also claim Trump has a cycle of fatigue consistent with this treatment, also rumors of repeated cognitive tests, and almost but not quite finally that this is the best treatment that exist for the suspected circumstance, and would very likely be the one chosen for the president, and finally that this treatment was approved by FDA after Trump became president.
So 1. The obvious IV, 2. Multiple MRI, 2.Obvious Symptoms, 3. Cycle, 4. Cognitive tests, 5. Best known treatment, 6. Circumstances surrounding the approval of the treatment.
These are the ones I’ve picked up even without having great interest in the issue, so there may be more. Of course not all points are equally strong, and it’s all circumstantial. But it’s false to claim it’s just the IV.
And finally as u/dhork mention, the blatant lying is a clear indication it’s something serious.