Some of the best hosts of the videos do their job really well, and it's interesting to see them play through different classic games, especially role-playing games such as Fallouts, Might & Magics and so on. Whole play-throughs with commentary are also good place to find tips and tricks, and new solutions to the quests that you didn't think of before.
Perhaps in future I'll update it a bit with new additions and correct some broken links if I find some. Perhaps there should be one for NES games too...
You can find that full list of links here: The Gamers' Dungeon - Let's Play Video archive