You need to create two files.
First open notepad and copy and paste the large block of text in the original post. Then save as downloadlist.bat.
Then create a text file in which you copy and paste the IDs for the five videos you want to download. Each ID has to be in a new line. Save that file as ids.txt.
Put both of these files in the same location as jav-it.exe. Then double-click on downloadlist.bat and the script should run.