According to some bloggers Youtube is offering Monetization of your video using Google Adsense. What does this means ? Means if you are used to upload videos on Youtube then now can earn from those YouTube videos. I know many who are with decent internet connection often upload a lots of video every month. Even there are community of users who are heavily dependent on YouTube. It must prove a nice boom for them.

Moreover I think if you have your video uploaded to YouTube and it turned out be a famous one then people using it on their site will again help you and your ads will be displayed wherever the video is embeded.