YouTube killed off the street DVD. shyt just spreads faster on YouTube and as that blew up, YouTube became the place to find clips of the stuff you were passing off hand to hand via DVD.
The mixtape era died before streaming. Part of it was that raid on DJ Drama's music. Another part of it was Drake blowing up off So Far Gone which was mostly original stuff, so we got tired of hearing freestyles over other people's beats. Then you had those cases where artists like Frank Ocean and Mac Miller couldn't perform shyt off their mixtapes because it was over copyrighted music. The '00s was that weird time where Digital Rights Management was causing everyone to stake their claim in what was theirs and what wasn't and who owned what. Before it didn't really matter. Now, if you had a clip of a song on a show and you don't have the right to license it, you gotta change it or you can't air it. With all the red tape that was gonna fukk up throwing mixtapes out there, labels just decided to barcode them shyts and sell em for retail.
Shout outs to those Hot 97 mixtapes. That was the "NOW That's What I Call Music" for the streets.