
Rennie will be responsible for developing and maximising all revenue streams for SeeSaw.
At Channel 4, he managed commercial relations with TV and online distribution partners including YouTube, MSN, Virgin Media, BT, iTunes and Tiscali/Talk Talk.
Rennie previously held senior commercial roles at Virgin Media and Warner Music Group.
SeeSaw is currently working on content deals for the site, which is expected to launch in the coming months.