option 1
if u are useing the a firefox browser which u can get from here
link
u could get this addon and then there will be links to download on the youtube video below the info and url the addon is here
link
option 2 is to open your browser and go to
link
and then copy and paste the url from the youtube video what you can see above the embed and then paste it in the empty box then press get links then below it will become three links press the one you want and then enjoy ;)