What version of Premiere Elements are you using and on what computer operating system is it running?
Typically when you when you get
it includes the complete timeline,
60 minutes of black screen beyond the actual video.
that means that you have debris (fragments, leftovers) at the point 60 minutes beyond the actual video.
Press the End key of the keyboard to get to the spot. When there, expand the Timeline with the -+ slider above the Timeline.
Then search all the tracks for obvious content that got pushed to the right or fragments of clips that were left when dragging clips around the Timeline. Sometimes these fragements present as very thin vertical black lines scattered about the tracks contents.
Please review and let us know the outcome.