I don't want to contribute to the discussion, but let me object this methodology for future web archaeologists. The WWW is the people's medium, don't ask developers, inventors and founding fathers how to pronounce or use something they created.
Technically there are two features that are specific to GIFs: loop and transparency. The video only talks about the loop, the endless animation, a moment that exists forever. Transparency is about the possibility to exist everywhere (on any page and any background), which is historically much more important for the development of the file format into the medium. GIF89a is a format to be distributed. The ability for one image to appear in countless contexts made it the success that it is.