AVIs can be made up of any of thousands of possible codecs, not all of which are editable.
Is this video from a miniDV camcorder, captured over a FireWire connection?
Download the free program MediaInfo and open one of your AVIs in it. Set the View menu to Tree and then copy the data it reports and paste it to this forum. That should tell us what we need to know in order to advise you how to proceed.
It's also important to know which version of the program you have.
Thanks for your response. The video was taken with a point and shoot Nikon coolpix camera almost 3 years ago.
Here is a screenshot of the two files - the larger one on the left is the one that gives the error and the smaller one on the right opens without issue.
I really appreciate your help. Please let me know if there is anything else I can provide to help.
I am using Adobe Premiere Elements 10.0
Microsoft Windows 10 Home Version 10.0.14393 Build 14393 x64-based PC with 8.00 GB Installed Physical Memory
Intel Core i7-4700HQ CPU
Like many older still cameras, your camera uses the MJPEG codec to create your AVIs. And it can be problematic to edit , particularly for older versions (pre-version 12) of Premiere Elements.
You may be able to make this video editable by converting it with Handbrake (a free download) to an MP4. Premiere Elements should be able to edit an MP4 if you've got your project set up properly (post-version 10 versions of Premiere Elements set up your projects AUTOMATICALLY to match your videos).
Though you may want to download the free trial of Premiere Elements 15 and give it a test drive. Most likely it will be able to edit this video with no modifications.
Google for the Morgan mjpeg codec.
Install that and you will probably be able to edit the clip.
Just this codec, not a whole codec pack.
I used Format Factory free software to convert AVI-formatted video on a flashdrive to WMV format. Premiere Elements 10 accepted the WMV instantly. Original format was Super 8 movie film I shot decades ago that was converted to MOV format by Just 8mm company in Texas (which I would recommend). Premiere wouldn't accept the MOV or the AVI format but did accept WMV at recommendation of Just 8mm.
Thank you for your time addressing this issue. I searched and found the codec and downloaded it - it downloaded as m3jpegV3.99.115.x64 and says it is an application. Do I put it in any particular folder or any particular path and just double click to run it?
Sorry for my ignorance on how this works.
Thanks again in advance
You double click on the exe file.