Just try and make yours different and unique
Short and sweet that's about it.
Try to delay posting videos until you recieve new content that no-ones ever played before (ie: new releases THE DAY they come out) with exciting gameplays and inciteful commentaries.
Try and make your videos as professional as possible, title sequences at the beginning with HD video gameplay.
Other then that, it's basically just about being yourself when presenting your videos, people enjoy someone being themselves instead of being someone different.
Hope that helps.
Posted on Monday, 16th July 2012