Dual layer

[FeelinDandy]

Hi guys, quite new to the subject but am trying to sus it all out.

Can any on the dvd burners burn a dual layer disc.
Since most movies are bigger than 4.7gb, are they just using a 4.7gb dual layer, so once 4.7 is used it goes to the next layer.

So is there a burner that can do a dvd copy of dual layered disc?

My other question is, are xbox games really bigger than 4.7gb?
and if so are they just on a 4.7 dual layed disc?

Thanks Guys