Formats for download - advice please

We've made a series of training videos which will be distributed as downloads to subscribers (i.e. not generally available on Youtube and the other streaming services). There is quite a lot of material in total (over 100 7-10 minute programmes) but users will be able to purchase any number from one upwards.

The client is being quite vague about their delivery requirements (...I think we'll need MP4s...) and I don't have much previous experience in this area. In the absence of more specific instructions should I deliver at the highest MPEG 4 option in Compressor (Prepare for HTTP Live Streaming Broadband High) or is MPEG 4 even the best option in this situation?

Grateful for any advice

H.264, formatted properly, with Compressor, works great. "Prepare for HTTP Live Streaming" is not a download format you want to get involved with, unless you're doing live streaming to mobile devices.

Sorry to be dense - but what setting would that be in Compressor?

The HTTP streaming Broadband High setting uses H.264, with an estimated size of 2.27GB per hour, 960x540.