I think you should go ahead.
I'm indifferent to the graphics/sound of Tiller's videos, as I know that it is very time consuming to create one of those shows. As an example, I'm still in the process of adapting an episode of Mike Klauss's "The Big Decision" (first played on a.t.g-s) that was played on BigJon's forums in March 2008. I spent several hours constructing the set. If I want to have actual motion, I'd have to keyframe all the characters and the scoring displays. The way the game was played, the contestants do not speak at all. Sound and animation are not trivial to do, and I comment Tiller for putting forth an effort.
On the other hand, I think the material to the games blows. For example, the question on his episode of Hall's "Split Second" that weren't taken from episodes on Youtube still sucked. For example, one question could not possibly be answered without having expert knowledge of "Masters of the Maze," while another required similar levels of familiarity with "Where in the World Is Carmen Sandiego?" The questions have been so bad that it is painful to get through an entire episode. On top of that, Tiller is not a very good host either, and he has all the time in the world to rerecord his voice if he should mess up. Yet he still seems like he has no idea what he's doing when he's hosting.
In summary, if you have good questions and are at least a capable host, I'd say go for it.
