I've always wondered why filmmakers rarely use GIFs in their portfolios. You usually see embeded videos, which means it's up to the thumbnail for the respective video, the text description, and maybe a few captivating still images to entice a visitor to click the playhead. There's no guarantee that a visitor will actually view the original work in the way that it's intended to be viewed: as a video.
A GIF is a direct way of bringing a motion picture to a visitor. The responsibility is no longer in the hands of the visitor to click a button to watch your work. They get a taste through the GIF. A short snippet of motion. The GIF is a nice medium between a still image and a video.
My films page now features all GIFs. I'm curious to see if others find it effective.