Originally Posted by adultmobile

Lots of the videos in the tubes are old and come from member area of sites closed since years, and their former owners have no wish or reason to file complaints. This include old VHS movies from amateur or small producers now closed. That's an huge amount of content that was produced commercially (also in russia, ukraine not in boureucratic way as in USA) but then no one of producers or closed-site owners would care or take the time to sue or just write a DMCA complaint even if they knew or seen it, they may make a laugh "oh look this is from that site I closed 10 years ago". Just digitize hundreds of european VHS cheap porn movies out of production from companies out of biz and you would get million hour long clips for a big tube with no likely anyone write any DMCA.

Different thing is content that is still in existing member areas from active companies and eventually also distribuded in DVD's, but how much of this material is in % in tubes?