Disabling 206 partial content responses on nginx

Disabling 206 partial content responses on nginx

I have an HTML5 web app that uses a tag. Depending on the user actions,
different parts of the video will be played in response. This video does
not exceed 5MB.
I need this video to be entirely downloaded on the client otherwise the
user will have to wait for buffering if the part to be played is at the
end of the video. Indeed, browsers behavior is to ask if Range Request are
supported and to get a HTTP 206 partial content response from my server
nginx.
I found a way to do what I want using xhr2 to download the entire video as
a BLOB. However, I was wondering if it would be possible, for browsers
which do not support xhr2, to make nginx refused Range Request and to send
a classic HTTP 200 response so that the browser will fetch the entire
video.
Is that possible? Thank you very much for your help!