How do I burn full movies on a mac?

[PutACork_init]

I have a Mac OS X how do I burn full length movies to a blank dvd? It says it's to big the movie is 700MB the disc is 4.7GB so that can't be right

 

[Shadows]

the movie is 700mb? thats a real short movie

 

[PutACork_init]

All movies on limewire are about that.

 

[Crackaghan]

um is it in the right format?

and ya movies on limewire are kinda lesser quality