Update: When I posted this, I had no way of knowing whether it had been altered prior to it being posted on Twitter. In the comments, Vega has verified from a TV schedule ap that the title of the show that was pre-empted by the Trump rally was, in fact, “The Life of Adolf Hitler”. So all signs point to this being genuine.
Update2: Consensus is that the chyronfail is from the cable or satellite provider channel-guide rather than NewsMax network itself. Apparently the guide wasn’t updated to the revised schedule.