Allow Customers to Upload Video to My Site

I need to add a "video upload" feature to my existing website. Customers can already logon and upload JPEGs and text descriptions, but when they try to upload a video, they get an error and time out. My programmer does not know how to fix this. My web host allows unlimited traffic and uploads, so this is not the barrier. How much programming time will it take to get such a feature to work? The form and all graphics are designed. I just need a brilliant programmer to help. Thx.