You are right, no intern modifies a video that will be aired on a major network without being seen and OK’d by superiors.
like fast and furious it had to go to the top...they didnt correct it very fast either until the rest of the lynching story was falling apart...
It's quite possible that no intern even touches an editing machine at NBC. It's inconceivable that a network production shop wouldn't be entirely unionized -- and interns wouldn't be anywhere near part of that.