1) Download the "Freemake Video Converter" from http://www.freemake.com.
Steps 2 and 3 refer to a few questions you will be asked during the FreeMake install.
3) During install don't install the "Tune Up Utilities" software ( untick the " I accept the terms of the TuneUp Utilities 2013" and click "Next".)
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4) Once you have installed the FreeMake software, open "YouTube" in a web browser and find the video you want to download.
5) Watch the You Tube video from start to finish to check the content.
6) Once you are happy with the video, highlight the URL (web address) with your mouse, right click and select "Copy". See screen shot above.
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7) Open "Freemake Video Converter"
8) Click "Paste URL".
9) Follow steps 1, 2 and 3 in the screen shot above.
11) Here is a key for the labels shown in the screen shot above:
A - Select the Video screen size ( I usually leave this setting alone).
B - Take note of where the file is to be saved or change the location of the saved file. ( default is "My Videos")
C - Finally click CONVERT.
12) The file will take a while to convert depending on the file size of the video.
13) Copy the finished video file you have just created onto a memory stick.