Your Dungeon My Dragon, on MSN / Xbox Live / YouTube
G&S Wiki; IMDb; YouTube

Apparently this came out in 2011, but I don't recall having heard of it until September 2014, when it reran on Geek & Sundry. It was created by Adam De La Peņa, who later created Outlands, which has a similar animation style (faux 8-bit video game) and a similar sense of humor. But I saw that show before this one. Anyway, I'm not sure what to say about it, except that there's a group of Hellish villains who want to destroy a group of fantasy game heroes called the Guardians. I guess. And I find it reasonably amusing. Um... it was originally 5 episodes, but a sixth was produced for Geek & Sundry in 2014. (However, that one seems to have disappeared. In fact I think the first five did, too, but I managed to find them on a different YouTube channel.)