I've had several emails recently from 3 different companies regarding a viral video i have on Youtube; viralspiral, fullscreen and viralvideouk1 each wanting around 30 to 50% commission for selling the license to use my video. Who has experience with this method of video monitising? are they worth doing? apparently i keep full ownership of the video but i'm not sure exactly how this works... is it just added to their list? and how do i know they will play fair? Oh and which do i choose? if any