Why use a third-party program for capturing your video?
If you use Premiere Elements' Add Media tools to get the media from your device, it will be imported in as close to the ideal format for Premiere Elements to work with as possible.
Using third party programs and converting video often creates video that will give you trouble in Premiere Elements.
I had to do the screen capture on a separate computer which does not have premiere elements, but thanks for the note. I'll see if I can figure it out through premiere elements.
Please excuse the question, but am asking just in case.
When you say that you are using Motion Effects (Scale and Position) for your .mp4 video on the Timeline, does that mean that you are keyframing the Scale and Position properties in the Properties Palette/Motion Panel/Scale and Position properties (using the Toggle Animation button there to initiate the keyframing)?
Please include in your response to SG.
Thanks for your reply,
I was in fact not keyframing any of the effects that I had set-up. I briefly looked into this but I ended up instead modifying the scale and position for the screen capture videos in another program (Camtasia) before importing them in Premiere Elements. This meant I didn't have to use Premiere elements' motion effects, and I didn't have the problem anymore.
Glad the problem is resolved.