IMHO, falsifying a report = lying. Lying = wrong always. Lying to a client = grounds for dismissal. OP didn't lie, but told the truth. If OP had lied, and it became clear, then OP would more than likely not work for that MSC again. Editor removed information, changed information, and stated they did so, and that is misrepresenting/deceiving/lying. Not only that, it reflects the OP's end result work product. If video was examined, and it contradicted what the editor's changed report reflected, well, you know that would come back on the OP for false reporting. I would definitely find a way to report this up the chain, starting with the scheduler.
Recently I was grilled by an MSC about details I had supposedly not reported in my survey. Turns out, an editor had removed some of my comments before accepting my report, and the project manager got it without my explanations. Those explanations changed the whole perspective of my answers, let alone removed the requisite commentary, upon which payment hinged. Oh, yes, I did make that clear, and I choose not to do more shops for them anytime soon.