greetings!

i am seeing an unexplained malfunction here with nginx when serving videos. flv and mp4 files have different symptoms. mp4 streams correctly when i view the file in firefox 39 in fedora 22, but in windows 7 (firefox 39) the file cannot be 'seeked' and must be played linearly.
after speaking with the coders of video.js (the player i use), it was determined that nginx is not returning byte range data appropriately (or at all) - so seeking would not work. however, this does not explain why firefox 39 in fedora works perfectly and does not provide a solution as to how to get nginx to serve correctly.

the only advice i have seen is to change the value of the 'max_ranges' directive - but doing that has made no difference. i have left it as 'unset' - which i understand to mean 'unlimited'.

an example video from the server is here: src="https://www.ureka.org/file/play/17924/censored%20on%20google%202.mp4"

any tips welcomed! thanks