I gave up on istock for video. The upload often went wrong, sales were low and 15% commission is horrible. Pond5 do everything better for me and pay 50% commission.
I have been hearing this from other people as well. Have you tried being exclusive there?
My plan was actually starting as exclusive and build up the portfolio as quickly as possible. After a while, let's say 6 months or a year, become independent. I guess IS will accept editorial videos as well in the future. That can make things more interesting.
