Source video
First of all, you can do this yourself on the source video by pausing it and using the period key (forward 1 frame), and the semicolon key (backward 1 frame) on the keyboard.
I have arbitrarily chosen the starting point as the 50 meter board. There are a total of 47 individual frames in the gif, starting at the 50 meter board, and ending with the first frame of contact. Since the source is 50 fps (and it does look like true 50 fps, when counted from the end of one second to the beginning of the next), 47 frames work out to .94 of a second approximately.
Before the point at which the gif starts, basically Hamilton feigns an outside move, and then fully commits to the inside, with going very close to the wall to avoid contact with Ver at all costs, presumably because they rubbed wheels on the previous straight, and Ham wanted to make extra sure there was no contact. Then, he goes towards Ver to open up Copse a bit, but does leave more than fair and safe space.
The main take away from this for me, is the fact that after starting to turn into Copse, the gap between Hamilton's front right tire, and the inside white line, keeps getting smaller and smaller, until the last few frames before contact, where it stays constant. Ham makes extra sure of staying clear of Ver; there is more space to be used between him and Ver to open up Copse before turn in, but he doesn't do that, imo because again, he tries to stay well clear of Ver to avoid contact.
Now contrast that with Ver. The gap between his car, and Hamilton is getting smaller and smaller; coupled with the fact that Hamilton is already getting closer to the inside white line, that means only one thing: Ver is giving less and less space to Ham.
Imo, driving wise this is clear cut almost all on Ver. The only thing Ham can be blamed for is the fact that the rules state it's the overtaking driver's responsibility to make a clean pass. Ham just put his car in between the apex and Ver. There isn't even a hint of understeer judging by the gap from the line to the tire. And you wouldn't expect understeer at that point yet, they haven't even gone 1/4 of the way through the corner.
I hope this puts to bed the story that Ham understeered into Ver, or the way worse one, that Ham tried to take him out deliberately. Imo, if contact hadn't happened, we would've seen Ham go onto the kerb or at least catch the inside white line eventually. Contact wouldn't have happened if Ver hadn't turned in aggressively, probably expecting Ham to back off a bit.