Some exist. Live at the Bike is the first one that comes to mind, they show every hand over a three-hour session (almost always cash games) with hole cards.
Sometimes you can find the webcasts of things too, though often they don't show hole cards - I've got the complete and unedited final table webcast of the 2007 WSOP
-E HORSE final table somewhere in that format. Never got around to watching it, 12 unedited hours of limit poker just seemed a bit like hard work.
Poker After Dark shows most (though not all) hands if you want something in between.