OK, I've uploaded some screen shots of my own here.
The first four show how to copy the log file to a folder "log" in the /home/user/MyDocs/.documents folder.
It is important to create the folder in the normal file manager, or running emelfm2 as root, other wise you won't have permision to create the folder.
It is also important to have the file on the left be the most recently selected file when you click copy. Once you have the log file copied out of a hidden folder (any folder starting with . is hidden) you can upload the file here.

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Now before I bog you down with too many other pieces of information: What I am most looking for is the information about Mplayer. I want to see that it is launching, that it is caching, and that it is trying to play. If any part of those steps is messing up, then we need to find out why.
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Otherwise, the begining of the data I'm interested is shown in screenshot5. If you have an N810 or a bluetooth keyboard you can use Ctrl + A to select all and Ctrl + C to copy, and then paste the text into a reply or new file.

Also otherwise, screenshot7 and 8 show how I access the built in logviewer that I wrote. Just enter the command as shown in the screen shot, and it should open.

Also otherwise, starting with screenshot10, you can see how I run the program with all of my debuging output visable from the terminal. This won't do you much good in showing me what's wrong, but it may help you see just what's going on with future issues.