Output-2000fps-resampled.mp4 -

This is an extremely high frame rate. Standard video is 24–60 fps.

The .mp4 container (using H.264 or H.265/HEVC codecs) is standard for sharing, though at 2000fps, the file bitrate must be very high to avoid "ghosting" or "smearing" artifacts caused by the resampling process. output-2000fps-resampled.mp4

If captured natively, this would require a specialized high-speed camera (like a Phantom). This is an extremely high frame rate