iOS 10 AVPlayer will not stream video from URL with no extension and with video/mp4 as content type

Question

Currently, we are using a standard AVPlayer via AVPlayerViewController to play video. We are streaming video from a url in the format https://ourdo

Answer 1

Alright - ended up discovering the answer to this is multifaceted. Here's what I needed to do to get things working.

1. Files did indeed need to have extensions.
2. The server was not correctly configured. It need to provide a progressive download response by responding with a range of headers.

By updating our backend to provide this response AND append the correct extension to the video files, we are now streaming to AVPlayer as expected. Thank you to everyone who offered tips!