i've been doing mine using livestream. when you live stream, it'll save an actual video of your stream on to you computer. from there, i take it to iMovie, equivalent to windows movie maker, then i speed it up there. here's my recent one done a few hours ago. [link]
iMovie is something that comes with a Mac computer. You can't really buy it unless you buy a mac computer. If you're running a windows operating system you can use Windows Movie Maker to speed up your videos.