7540 gpu

Hello all. I have 1 old HP G62 that I adore and have done a few things to but it is not up to the task of video editing. I also have a lenevo that is useless. Ideapad1, I know i know.... Anyways, I got a DJI action 3 and found out I can't edit videos with either of them. So, I was recommended a couple good options and went with the Precision 7540. 512gb SSD (possible 1 or 2tb crucial upgrade if needed), 32gb ram (i plan on putting another crucial 32gb in it). They say 64mb max. I went with the 7540 because of build quality. I like heavier, substantial feeling things. New lap tops are thin and weightless. I don't like that. 7540 is over 5 pounds. I like that. Now, the thing holding back this lap top I think is the T1000 nvidia gpu. For video editing I heard it is not great and can't do 4k. I don't really know much about video editing vs gpu/memory. Is it possible to put a RTX 3000 gpu from another 7540 into this one? Or the RTX 5000, or even the T2000? How bad is the T1000? I don't really plan to play games. If anything, old games from early 2000s. I got it at what I think is a great price on ebay, reburbished by dell with a 2 year warranty. $400 in grade A+ condition. They say brand new. It will be here tomorrow. Thanks.