Oh my gosh, I remember this entire VHS opening for Scooby Doo & The Alien Invaders. And I know it's this one because they even previewed for the Courage the Cowardly Dog short that came after (which was "The Curse of King Ramses")
There were also these cool skits during Scooby Doo's Greatest Mysteries
And then on some of the VHS, there would be that little dial up sound at the end (like someone dialing on the old telephone).