Thank you @nacx! I fixed it and now it is working! I've built my own version of s3proxy with my compile jclouds and it detects correctly the content-type and plays the video in the browser.
I've done two commits, do you prefer that I ammed the, in only one? --- Reply to this email directly or view it on GitHub: https://github.com/jclouds/jclouds/pull/780#issuecomment-113911591
