Fgdmp4 -

Because the video is in chunks, your player can dynamically ask for a lower-quality chunk if your internet slows down, or a higher-quality one when it speeds back up—all without pausing to buffer.

It breaks the video into tiny, independent "moof" (movie fragment) and "mdat" (media data) pairs. fgdmp4

"FGDMP4" appears to be a niche or specific term most commonly associated with technology used in adaptive streaming. Because the video is in chunks, your player