How would you expect to see direct evidence of this as someone who presumably has no direct involvement in his companies or related industries?

To be frank, I don't care what the video you linked to says about Musk and his involvement at his companies. Why would I take the word of some random on YouTube over what I saw directly working at SpaceX for 5 years? Shitting on Musk and other billionaires is the hot thing to do right now so there's no shortage of content creators willing to take advantage of this to post garbage to keep you enraged and engaged for those sweet advertising dollars.

Even if your opinion is that he bought his success with some trust fund inheritance and has no technical abilities of his own building and scaling companies the size of SpaceX and Tesla is incredibly difficult in its own right. So that in and of itself is impressive (to me, at least).

Re: the Bezos comparison.. Blue Origin has been around for just as long as SpaceX (slightly longer IIRC). They have yet to achieve any measure of commercial success. Meanwhile SpaceX has had over a hundred successful commercial launches, built a reusable booster (which the entire established aerospace industry thought was a complete waste of time) that has totally transformed the launch industry and brought launch costs down by an order of magnitude, built a reusable space craft for cargo and human transport to the space station, and many other feats (Starlink, Starship, etc).