Hello.
Try inserting this line again:
set logFName to (folder "Users:UserName:VideoCamera:" of startup disk as string) & logname
Instead of this:
set logFName to "Users:UserName:VideoCamera:"
Sorry for that one. 
Best Regards
McUsr
In running the program I am getting the error "It is impossible to obtain text item 2 of {“There are 2 files with name equal to M2U01300.MPG”} when executing command line
I’ve started the batch with “MU201300.MPG”.
The file Filetocompile.txt contains this record:
There are 2 files with name equal to M2U01300.MPG
Regards!
Daniel
Hello.
Open the filetocompile.txt in text edit and hit return at the end of the line, then save it.
If that doesn’t work, delete the line with MU01300.MPG and try running it again. That is make sure that everything in
the file is deleted, then save the file and try again. That should hopefully work.
Best Regards
McUsr