For example, if a musician has a lot of regular viewers, would he be able to contact a company like Fender and ask for some new equipment in exchange for item promotion or another form of advertising?
Let's pretend for a minute I'm the Fender rep looking at your request... Do most of your videos prominently show you playing bass/guitar? Are a large segment of your audience gear buying people? Are the musicians in the videos fairly good and play out at shows often? I say go for it, you never know.
I don't know for sure that it happens. But some of the gear review shows on youtube definitely have enough of an audience to be worthwhile for manufacturers to just give them stuff to try out. 'That Pedal Show' is pretty solid that way. And the fact that Robert Keeley made them a signature drive/boost pedal strongly implies that they are doing that well. The 'D & M Drive' even has Dan and Mick's (cartooned) faces on it.
LOL. yeah, I'd be willing to bet marlowDK and scott devine? get a little hook up from time to time. I would not be at all surprised to find out manufacturers just throw gear at their feet.
I can tell you with 100% certainty that, yes, you can get endorsements from youtube videos and subscribers alone.
I think it depends on the brand. Some big brands main requirement is you have to play so many gigs a year. Usually a least a 100 for big name brands. Other brands it’s totally doable. Our drummer has had a few for example.
If they want you, they'll let you know. The better way to get their attention is to start tagging them, playing their gear exclusively. If you go emailing them flat out demanding free gear (which they don't give you anything for free, you'll get a discount) they'll likely trash your email just as quick as they can hit the Delete key.