Most of the disruptors from the last two decades are gone -- Amazon, YouTube, et al. are the survivors. If you look at the survivors most of them got picked up by bigger companies -- Google/Alphabet owns YouTube, for example.
Barnes & Noble is still in business and supposedly coming back. Borders didn't survive. Small bookstores still serve local customers. Amazon disrupted logistics and online retail, not just the book business, and I think their takeover of book publishing happened more through the Kindle and DRM'd e-books than through online sales.
Netflix, HBO, and Disney probably did more to push traditional television out of the living room than YouTube, and Comcast is still going strong in the US. If you're into sports or like to watch news and junk TV you still need a TV service, at least in the US. Very little of that content gets to YouTube unless you mean YouTube's TV service, which to me is just another option for TV service -- it doesn't produce new material.
If I had an actual idea to answer your question I wouldn't post it here, I'd try to build it myself.