It was a very interesting video. I doubt most young so-called computer geeks would even know what a clone is, let alone know what VHS and Beta is.
Actually around 1983 IBM was not "left in the dust". They were by far the biggest manufacturer world wide in the 1980's and early 1990's on IBM type PC's, partly because IBM had the most reliable machines due to the highest quality design and manufacture. Because it was a major investment, corporations tended to prefer IBM. There was a saying in the industry, "No-one ever got fired for buying IBM". On the consumer market, IBM machines were too expensive for most people. Many of the clones has problems with compatibility, especially due to the early ISA bus timings which were never properly published by IBM, so clones often had problems in the early days.
It is true, Compaq did rewrite the BIOS from scratch. That is remarkable. In contrast, I think Dick Smith could shed some truth on where the Dick Smith System-80 got its Tandy TRS-80 Model 1 compatible ROM from. Yes we know it was EACA in Hong Kong that designed and manufactured the System-80, but I wonder if anyone has done a ROM comparison between the TRS-80 and the System-80. I would not mind getting the ROM of both and doing a comparison. And exactly why was the System-80 withdrawn from sale very quietly all of a sudden? Hmmm.
By the way, Potter might have been related to the Potter and Brumfield company (not sure about this), who also supplied to IBM.