Aye, sounds like that might be the thing. You can disable auto-run in the options, or, alternately, you can hold down the shift key as you click to move, which will force your character to walk. (If you have autorunning disabled, you walk everywhere and holding down shift makes you run. This is my personal preference, but I usually play sneaky-types.)
I've always had trouble recording game footage in the original Fallouts, and it's only gotten worse as the game's become more and more technologically outdated. I'll see if I can work up a tutorial vid in the next few days, but I'm afraid I can't make any promises.