BitTorrent solved the limited upload speed problem. Split the data into chunks and download from multiple users at once. Even that is only necessary if a user doesn't have enough upload bandwidth for a stream, which for 1080p is ~5Mbps.
And the second problem has a simple solution. Give the customer a tiny discount for uploading. Anyone with an unmetered connection sees it as free money even if it's only pennies/month, and it works fine even if some customers turn it off because the discount-accepting customers can upload more than they download.
