If the "mp4" file asks you to download a specific "codec" or "player" to view it, it is likely malware . Standard MP4s do not require special software.
Some NFT platforms or Web3 video hosting services generate unique identifiers for media assets to ensure they are tamper-proof. Technical Breakdown of Such Files AIN3bq360W93wXEF mp4
Since this file is not indexed publicly, you should exercise caution: If the "mp4" file asks you to download
Because this string is highly specific, it most likely belongs to one of the following categories: AIN3bq360W93wXEF mp4