If the files are created with Quicktime, why not edit them with Quicktime?
I agree with John. Use Premiere Elements to capture the video you're going to edit.
But, if you're creating video with another program -- especially Quicktime -- it can become difficult for Premiere Elements to recognize the video's specs.
It is created with quicktime because it is a screen capture. Like a presentation. Premiere elements doesn't have that capability. It is pretty hard to believe adobe stuff isn't better than this with quicktime. I think the properties are readily in the file properties.
Rather than "thinking" the information is there, why don't you do a test?
Edit Quicktime created files with Quicktime and then you will KNOW if there is a difference