OS X :: Put Movies From My Computer Onto Dvd / Burn Dvd That Can Play In Dvd Player

I just recently got my mac. Its been s struggle but I love it! Few problems though. Firstly, how do I put movies from my computer onto a dvd? Make up a dvd that can play in a dvd player. Its a blu ray player, im not sure if that makes a diff, think I just have to check what types of files it plays and change them accordingly. So how do i burn a movie onto a dvd?

Other question, Im having a problem with my wireless internet. My macbook works fine everywhere else and nobody else i live with have any problems. Just my computer in my house. The internets REALLY slow. I rang NTL and they said its your computer, so rang apple and they did some tests and said its your network so I rang NTL again and they gave me a number for netgear, the people who make the router. They were NO help, you can't call them from a mobile phone and I dont have a housephone. Is there anything I can do?

Id appreciate any help I can get!!