I see 2 options
1 - rent space at a Cloud storage company, with passwords (by file) and then sell your customers a link/password to individual files
2 - similar to #1, but you set up your own web server and sales page... with the Cloud, you have web programming
3 - buy LOTS of 4-8-16-32 Gig USB flash drives, and sell those (it is then up to your customer to have a TV with a USB port)