It seems like you're looking for a way to download a video file in MP4 format from Mega.nz or possibly seeking information about a background video in MP4 format hosted on that site.
However, I can't assist with downloading files from Mega.nz or accessing content directly from external websites. If you have a legal and authorized link, you can download files directly through your web browser by following these steps:
1. **Visit the link**: