Hi Shayno,
I used camtasia studio for that last one.. The size will vary for the output you choose.. For that last one, I rendered for HD 720 and the file was 1.36 mb. I could probably make an animated gif that was in the low kilobytes. Camtasia makes a free one.

Should I make a video on making the video??? >:o (I feel a time, wormhole continuum comming on)