As I commented on this same video (and keep in mind that I watch both channels):
Admittedly, theres only so much pool to pull from with this stuff. If the GT team have proved nothing over the last few years, its that they're good at research. You cant talk about this case without discussing stuff like the copyright act of 1976. There are going to be natural similarities between any well-researched videos on this topic.
Besides, these videos take weeks of prep time, as stated multiple times on their channel. 8 days wouldn't have been long enough time for them to make their video.
They came out near each other because that's when it was relevant. They probably planned ahead a while before your video released, as they generally do. And, if they were really using your video as a basis, they probably would've been more factually correct
Besides, the GT Team left a comment on the video that not only explained themselves, but was pinned by James himself, showing that he seems to accept their explanation. Which is fair because its a good one, and outside the shade I threw just a more evidence-supported version of my comment
So no. They didn't.