Development of a Video and Images Library

Hi Guys, Need a website to be developed and integrated with our pre-designed UI. What we need is as below. 1. An admin tool that will upload the image and or the video to the site along with the thumbnails. 2. Admin should be able to set the price and item code. 3. Admin should be able to set the start and end date/time for showing it on site. 3. Visitor may click on the thumbnail of the Video and see a preview of the(watermarked) video. 4. Visitor may click on the thumbnail of the Photo and see a preview of the(watermarked) photo. 5. Visitors may add the video or photo or both to the cart and purchase them using the pay-pal checkout at the price set by admin in the admin tool. 6. Once the paypal payment is confirmed buyer should be redirected to the download of the file page. Please provide your bids and hope to end up with a good deal soon.