Like those in the original Giphy Cam, the effects will probably make more sense if you're kind of buzzed — they've got that Ren & Stimpy flavor — and there's a lot to play with. Take a look ...
There are other GIF converters out there, but using Giphy is going to be the easiest path and will leave you with a quality GIF. Below is what that'll look like. You can also make GIFs from Vimeo ...