I do hope you realize that for what you've stated, I honestly feel that Windows is your best best. Since you say you are a gamer, and that you want something that can do inet, video editing, email, etc. Windows is honestly your best choice IMO.
While linux can do the latter part, for the most part (minus video editing which it lacks any really POWERFUL tools for), it is not a platform for a gamer. Dual booting, while possible, can be more of a pain in the butt than its worth. Rather than dual booting, I would suggest picking up a $200 pc off ebay, getting a KVM switch, and running each os on its own pc if you insist on two OS's just until you've learned the alternative well enough.
Just my two cents.