YouTube is testing pre-roll and post-roll ads behind the scenes, say BusinessWeek and others. While these are shorter than your typical 30 second TV slots, they’ll still be super annoying and could kill the addictive nature of the site.

But there’s another, really powerful solution that Google should consider (no doubt they already have, in which case this is a vote for it). If you’re too lazy to read, just look at the images and you’ll get a sense of what I mean.