I don't think it's altered video. I'm just describing possible things that people could see in that video, which might lead to that conclusion:
1. an odd camera motion;
2. scared spectators jerking; or,
3. altered video.
I do, however, think the people downvoting me have significant reading comprehension problems. However, that's a thing they will have to reflect on, internally, and has no bearing on me.
You started off with a claim that the video was sped up (i.e. _altered_). I'm not sure anyone downvoting you has a problem reading.
He's not the one that made the claim. Look at the usernames.
It's not like you're mentally deficient or anything so there has to be a logical reason in your mind as to why you ended up thinking this. I would be very keen to know what that is.