Caution: if you alt-tab away or mouse away from the window youre working in, SnagIt will capture the other windows that are in focus on your screen.
To stop recording, just hit the Print Screen button on your keyboard. The program will ask you if you want to stop recording; it will also have an option to resume, in case you just needed to pause. When youre done, tell it to stop recording and it will take you back to the SnagIt editor, with a preview of your video. Click the Save Video button to save your video so you can edit it as you see fit in any program of your choosing.
You should have a saved animation similar to mine, above only I hope you spent more than a few seconds on yours, and didnt try to draw with the mouse like I did. (My cat seems to have kidnapped my tablet pen, and I cant find it!)


