NobodyReally
Superstar
It was completely out of character. IM is the most rational of the avengers. Sure I can go yeah it makes sense for him to fly off the handle but I can also say its such a sloppy sloppy way to move the plot towards that direction. This is a dude who can literally hack into any computer in the world and this vid somehow has escaped his hands for decades? Never mind the fact that bucky choking them out would negate the whole died of natural causes thing. Movie is a good watch but it has a myriad of plot holes which is w/e since its a marvel superhero movie but people making this out to be some cinematic excellence are confusing me.
That video was a VHS, not digital. There was no way IM could find it because he didn't know it existed and even then he would have had to physically locate it. Zemo couldn't even get his hands on the video until he cracked Bucky in interrogation and found out its location.
And in regards to Bucky killing the Starks. He clearly hits Howard in the head twice and then places the man's head on the steering wheel to make it look like it was the impact of the crash that killed him. And he uses his human hand to choke out Mrs. Stark. I doubt there was a thorough autopsy though since she already had sustained injuries from the crash.