bec, i've seen lots of feeds that just offer wmv or wmv and mpg and don't use or require a streaming server.

perhaps asking a host is the best idea as being able to accurately and quickly see how much monthly bandwidth each feed customer is using would be very important.

other than metering bandwidth use separately for each user, seems like the only real issue is security. .htacess is not going to do it - perhaps they could use a special license for a system like strongbox or proxypass.