Please clarify....are you talking about view videos exported from Premiere Elements 10 and played back in a computer player?
Or, are you talking about trying to view the Premiere Elements 10's Timeline content in the Edit area monitor?
I suspect that the second is the situation.
Therefore, critical information....
a. What computer operating system is your Premiere Elements 10 running on, and what video card/graphics card does your computer use.
If NVIDIA GeForce card, then 99.99999% certainty that is your issue where the answer is not to up date the driver version but rather to roll it back to about
The other part of the issue may be that you have moved, deleted, or renamed source media that went into the project after you saved closed the project.
Are you getting any "Where is the file.....?" messages to go along with the colorful display Media Offline displays?
See Announcement at top of this forum regarding Premiere Elements 10/NVIDIA GeForce issue. All you need to know about the issue and the remedy are described in it (links included).
We will watch for your details.
In case you did not find it, the following is a copy/paste of the Announcement on Premiere Elements 19/NVIDIA GeForce
that appears at the top of this forum.
Premiere Elements 10 NVIDIA Video Card Driver Roll Back
If you are a Premiere Elements 10 user whose Windows computer uses a NVIDIA GeForce video card and you are experiencing
Premiere Elements 10 display and/or unexplained program behavior, then your first line of troubleshooting needs to be rolling
back the video card driver version instead of assuring that it is up to date.
Since October 2013 to the present, there have been a growing number of reports about display and unexplained workflow
glitches specific to the Premiere Elements 10 user whose Windows computer has a NVIDIA GeForce video card. If this applies
to you, then the “user to user” remedy is to roll back the NVIDIA GeForce video card driver as far as is necessary to get rid of
the problems. The typical driver roll back has gone back as far as March – July 2013 in order to get a working Premiere
Elements 10. Neither NVIDIA nor Adobe has taken any corrective action in this regard to date, and none is expected moving forward.
Since October 2013, the following thread has tried to keep up with the Premiere Elements 10 NVIDIA reports
Older NVIDIA GeForce drivers can be found
A February 2014 overview of the situation as well as how to use the older NVIDIA GeForce drivers for the driver roll back can be found