how to transform one-line xml file into multiple-line format

[esolve]

from the following link
http://gdata.youtube.com/feeds/api/videos/cNd4eocq2K0
I can get a xml file
however I noticed that there is only 1 line in the file using vim or gedit
there is no line feeds
but I see on some articles
the format is changed into multiple lines

how can I make the files into multiple-line format
thanks

[Rubberman]

XML uses <start>...</end> tags to identify components in the file. Multiple lines are not required, so many times you will see this. Most browsers and/or XML editors will happily add new-lines for you, and should have an option to save with new-lines intact. The alternative is to use something like sed to convert the file for you.