MP4 (MPEG-4 Part 14), a container format developed in 2001 that balances compression with quality.
The "(1)" in the filename suggests a system-generated suffix when a file named "2000.mp4" already exists in a local directory. 2000(1).mp4
Based on standard archival practices found on sites like Internet Archive , a file with this name generally adheres to these specs: MP4 (MPEG-4 Part 14), a container format developed
Files with this name frequently contain segments of BBC News , EastEnders episodes, or UK television idents from the turn of the millennium. Common Technical Profile MP4 (MPEG-4 Part 14)