Both parties have been moving steadily to the right for the last 40 years. So now, the Democrats are where the Republicans were in the 1980s: boring corporatists and friends of banks, pharmaceutical and insurance companies.
And the Republicans have moved all the way into an insane asylum.
Youtube isn't some one of a kind miracle. There's at least a dozen already-established streaming platforms that would take its place. There are thousands of websites that have no problems hosting gigs and gigs of porn, so it's not as difficult as people think.