0hbuhon1ba36tv6deuft1_source.mp4

The string is an example of a or hash.

Because the name is a randomized hash, the string itself does not describe the video's content (e.g., whether it is a cat video or a news clip). It is purely a used by a server to locate the file in a storage bucket, such as Amazon S3 or Google Cloud Storage. 0hbuhon1ba36tv6deuft1_source.mp4

You will most often encounter this specific naming convention in the following contexts: The string is an example of a or hash

When you download a video directly from Reddit's mobile app or view its source code, the files often follow this long, randomized pattern. You will most often encounter this specific naming

This confirms the file is a video using the MPEG-4 Part 14 container format, which is the industry standard for web compatibility. Where These Files Usually Appear