I know that there are a lot of mixed opinions about Let's Plays, and some people actually feel quite strongly about them. There are some people who just hate them, and think that they are for losers and are pointless. And on the other hand, some people legitimately enjoy them, and will actually watch whole series. And then there are plenty of people that don't care, I'm sure.
If you don't know what a Let's Play is, it's basically when somebody records himself playing a video game and commentates it. Sometimes they narrate the dialogue in-game, or tell jokes, or just do other little things to personalize it.
Personally, I don't mind them, and I may watch a few episodes if they're about a game that I don't have access to/can't play. I see no reason to hate them.