A:AnswerWhat kind of game is it? Check the specs on this computer if it meets the specs your game is telling you that you need I would follow that. There are a lot of gaming laptops out there but they tend to be expensive.
A:AnswerTBH, I'm not using this for editing, but checking email, FB, watch movies. But, I will say I'd go for something much more high-end for 4K editing. Something much more faster than this because 4K files are huge and need a lot of power to deal with them.
A:AnswerOne year manufacturer warranty and yes - to Samsung is required for warranty coverage. If beyond the 1 year warranty you can use Samsung or Geek Squad services as will be an at-cost repair if needed.