Go to View Folder types and unclick "hide extensions of known files". Then, rename the file caled .avi as .avi.001 etc..... . But make sure the avi file has the same name. If you have vid1.avi...

I have a similar problem. I downlooaded a rar file with 10 avi files in it to join. I had to add the .001 + extension to the 10 files. I joined them and they addec to to 38 MB. But, when I layed the...