: This is a unique hash or identifier. It is often used by servers to track files without relying on human-readable names, which can be duplicated.
: This indicates the vertical resolution (480p), commonly known as Standard Definition (SD). It suggests the file was optimized for a balance between clarity and small file size. 1b4a1668c0.480.avi.mp4
Did you on your computer and want to know what's in it? : This is a unique hash or identifier
Is this part of a you are working on?