Okay, Mouser said Board Games, so I'm gonna hit the Chess side!
For me, it's one thing if a GM can play, but I just have a tough time with foreign accents in the "new craze" of chess videos. (Big debate there, Videos vs Books, but that's another thread!)
So of the videos, via ChessBase aka Playchess, I got hooked on Daniel King's videos. http://www.youtube.c.../user/PowerPlayChess
Now, there's a bit of a trick to being a chess commentator. Because the only games "people care about" are the top 25 Super Players, it poses a bit of a problem because for example Chessbase has started making the commentators not use computers in their live comments, so that they don't sound like "high and mighty gods from the armchair".
All well and good, but typically the commentators are rated 350 points below their game subjects, and medium-often they guess and miss. Here's where it gets tricky. The commentator doesn't pretend to be able to beat the game player - hence why he's in the news booth and the player is at the table. But if he can get close to the right idea, then for the viewer it's close to what the super-player is at least working on at the board.
When faced with a Super-Class move or four, the good commentators admit they have no idea what's going on, but then at least try to chop up the basics and keep going. A few second tier commentators just became tired and kept saying "I have no idea what this move does... I'm so lost...".
Daniel King then does re-caps with the computer indeed on, posted to ChessBase, and is one of the best to really hone in on the age old problem of Material vs Initiative & Mobility. Millions of Grandmaster games get all wrapped up in "Player A has an extra pawn, but to get it he had to give Player B active pieces and stuff to do for X amount of moves." So if Player B's Chaos confuses Player A, he wins fast and brutally. If Player A survives the Chaos, he wins because he wins a 66 move endgame with an extra pawn.
*That's* what modern GM chess is.
Plus Danny King has a cool accent! And a is a GM chessplayer named King!
Runner up because he doesn't officially have a channel but he's the lead "text reporter" for Chessbase is Alejandro Ramirez. He's fast enough on his feet to catch the other half of the game's story, so if you merge both of those commentaries, you basically get anything you need to know about a GM chess game.
2nd Runner up because he's rarer is "only" IM Andrew Martin, who talks at a faster Word Per Minute rate, and sometimes that matters for instruction if you're one of the types who works that way. So he might find some finesses the other two missed and he delivers longer sentences with more dependent clauses faster. See me in a PM if any of you are Learning Theory mavens and want to thrash out private theories. Just sayin' Martin earns "Second Runner Up".
A word on Accents. King's accent is closer to "Received Pronunciation". Martin's is a different kind of dialect. (Northern? Half-Cockney without the slang?)
So a typical Chessbase report ends up with Alejandro Ramirez on print reports, Danny King on video.
But if you do a YouTube search for Alejandro Ramirez, he's pretty good on lectures too. Here's a couple of links for A. R. http://www.youtube.c.../watch?v=PAgfd7IK1Eohttp://www.youtube.c.../watch?v=RhuqBrFl2xc