The reason the first part of the tape had to be edited was that a note from an FBI reviewer said it showed a passenger getting out of the truck when McVeigh got out of the truck on the driver’s side.
This had to be edited because for the government’s story to be true (which it’s not) McVeigh could not have had a passenger named (do you know who it was?, I do). The brown pickup truck that sped away was identified and the occupants were identified but the government buried this information.
The government found out decades ago that it’s very easy to tell THE BIG LIE and you’ll believe it, no matter how obvious it is that lies are being told.
None of this will really make sense until you know WHO and WHY and HOW these lies were told to cover up the truth. It’s really not very complicated but you’ll believe BS on CBS and NBC before you’ll even consider the obvious truth, the brainwashing of America has been especially effective.