When I visit youtube site lots of url are downloaded
example
s.ytimg.com/yts/jsbin/www-scheduler-vflKNUgKf.js
s.ytimg.com/yts/cssbin/www-core-vfl9oSZMs.css
s.ytimg.com/yts/cssbin/www-pageframe-vflBAxl1M.css
s.ytimg.com/yts/jsbin/spf-vflfSATMX.js
s.ytimg.com/yts/jsbin/www-en_US-vflpxmjgo/base.js
s.ytimg.com/yts/swfbin/player-vflHoZPOA/watch_as3.swf
s.ytimg.com/yts/jsbin/www-en_US-vflpxmjgo/common.js
s.ytimg.com/yts/jsbin/www-pageframe-vfl9AaGh-.js

the variables are either before the file extension or end part of directory

can we save the variable url in fix variable or no variable
s.ytimg.com/yts/jsbin/www-scheduler-vflKNUgKf.js

URL TRANSFORMING or any other option
s.ytimg.com/yts/jsbin/www-scheduler-123456789.js or s.ytimg.com/yts/jsbin/www-scheduler.js