Pause video file download via JS?

Question

Is it possible to pause a video file download (I assume an http get request) and resume it at a later time?

My website ajax requests all it's pages and I'd need to pause a video download if the user needs to download something else (to stop too much bandwidth being used).

Scenario: - User visits webpage - Video starts downloading - User interacts with another part of the webpage - Video stops downloading - Another file starts downloading (initiated by the user) - Once file download complete, video download starts where it left off

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I already don't think this is possible due to the little amount I can find on this subject. My colleagues also suggest it's not possible.