Yes! Go to the Media Center by clicking the second button on the bottom men:
Upload a video you want to sell, or click "manage" on a video already uploaded.
Select "store" and then add a price, title, description and click "Is For Sale" to add it to your store.
Videos for sale appear under the STORE tab on your profile page.
The videos in your store will NOT automatically post to your feed. Uploading videos to the Media Center will NOT automatically post them either.