The first video of the train crossing a trestle was just fine. The second one, of the long freight was pretty 'heavy' on content; as Leksie implies. If your Trainz 'stutter' in the game, that will be picked up on the video (I know; that's a 'Duh!!) In the third video, of the truck waiting at a crossing gate with a fast freight passing; it seems the video itself was stuttering, as if the frame rate was slowed. The codec you initially used to capture the clip may be at fault there.