It's called Times Past Television and while it doesn't carry complete seasons of shows, it has some pretty obscure stuff you may remember but haven't seen in decades. 

Among the titles on its YouTube page:

-Highway Patrol
-The New Andy Griffith Show
-The Bold Ones
-Room 222
-I'm Dickens, He's Fenster
-The Defenders
-The Paul Lynde Show
-The Governor & JJ
-Arnie
-The Pruitts of Southampton
-NYPD
-Judd For The Defence

And, perhaps most pertinent to this board,

-Good Morning World, a mid-60s comedy about two morning DJs.

There's a lot more on there if you recognize a title or two you haven't seen or thought of in a long time. Worth a scroll through the list of videos, if nothing else. What a memory flogger!

Times Past Television