Download YouTube Videos with Flash Video Downloader

I use Firefox with an Add-on called “Flash Video Downloader”
2. Then Click on the Menu iCon and choose Add-ons. Choose Extensions. Search for “Flash Video Downloader”
 
Install Flash Video Downloader
 
Now you will have a “Download” Menu under your YouTube Video. The top video shown is usually the best one.
 
 
 
Save the Mp4