The perspective matters. For the most part, I have been in the 'faster' class in run groups. We all look at it from where we would typically be.
In Nat's video, I can see the BMW making the pass and coming inside. Is it unreasonable to think that (if Tim hadn't clipped him) that he would have left some racing room (he might have been seeing as how there was a 3rd car in there)?
And to add, when Nat sees the BMWin T-1/T-2, he probably has no idea he spun because he is rolling pit-out. Noticing an ITR car there would have me extra focused on the mirrors in the short term.
But like Lawton said, it's all arm-chair at this point knowing Tim bumped Nat. God, video is cool.