5251-br720p-gr-terata3.mp4

: This is a MPEG-4 Part 14 container, which is one of the most widely supported formats for video playback on computers, phones, and smart TVs.

: Most modern players like Windows Media Player or VLC Media Player can open this file easily. 5251-BR720p-GR-TERATA3.mp4

: These are likely internal tags used by the "release group" or the person who encoded the file to identify their work or specific versioning (e.g., Greek subtitles or a specific team name). How to View or Share the Content : This is a MPEG-4 Part 14 container,