Finally figured it out. So very easy!
Download a program called Nandub.
From file option, select “Open Video File”.
Select first avi file.
Select “Append AVI segment”
Select 2nd avi.
Under the “Video” menu, select “Direct Stream Copy”
Under “File” select “Save as AVI”
Let me know if this did the trick!
I’ve spent hours searching so I know the value of finding what you’re looking for straight away.
I’ll eventually merge all my individual postings into a single pdf available for download.