Cover.mp4 -

This is a massive, unprocessed file (often 1GB for every 30 seconds of 4K footage). This file contains the high-dynamic-range data that Google's servers use to "boost" the video's lighting, stabilization, and color. How the Process Works: Upload: Google Photos uploads both files to the cloud. Processing: The "Boost" happens on Google's servers.

It is a generic filename often used by artists or creators for a video cover of a song (e.g., "Misty Cover.mp4").

Did you want to know more about this feature, or were you looking for a script to implement a background video named "cover.mp4" on a website? One of my favourite music quotes! | Nick Higgs The Singer Cover.mp4

Once the boosted version is ready, Google Photos downloads the final high-quality version and typically deletes the massive raw MAIN.mp4 to save space.

Users often find these files when manually backing up their phones or using third-party file managers. If you see a COVER.mp4 file and notice it looks lower quality than expected, it simply means the "Boost" hasn't finished processing or syncing yet. This is a massive, unprocessed file (often 1GB

If you try to share the video before processing is finished, you are usually sharing the COVER.mp4 preview.

This is a 1080p, standard-quality video file. It is generated instantly so you can see what you captured, share it quickly, or check the framing without waiting for cloud processing. Processing: The "Boost" happens on Google's servers

When using the Video Boost feature on Pixel phones, the device generates a temporary file named COVER.mp4 . This is a low-resolution (1080p) preview that you can view immediately while the high-quality version is being processed in the cloud.