For the files for which the error "codec missing" comes up, you need to have same version Premiere Elements (serialized) installed on your PC and activate the royalty for these files to play in Elements Organizer.
Following link lists the video viewing options in Elements Organizer :
You can purchase PRE from :Video & movie making software | Adobe Premiere Elements 15
Thanks Arshla; I'll give it a try
Also, I now realize that if I wait a while, the next time I check, many,
but not all of the videos now have a thumbnail and play no problem. Maybe
the computer just is not fast enough, although it is new and it's a middle
of the road for computing power.
On Tue, Mar 14, 2017 at 1:50 AM, arshla jindal <firstname.lastname@example.org>