One thing always present in winning tactics/strategies is initiative. By taking the initiative you force your opponent to react and therefore they lose their initiative. They can no longer execute new plans of attack effectively because they must respond to your initiative.

The second point is the OODA Loop (observe–orient–decide–act). You can limit the effectiveness of an opponent by getting inside theirs to disrupt them -

https://en.wikipedia.org/wiki/OODA_loop

The key is to obscure your intentions and make them unpredictable to your opponent while you simultaneously clarify his intentions. That is, operate at a faster tempo to generate rapidly changing conditions that inhibit your opponent from adapting or reacting to those changes and that suppress or destroy his awareness. Thus, a hodgepodge of confusion and disorder occur to cause him to over- or under-react to conditions or activities that appear to be uncertain, ambiguous, or incomprehensible.

Flynn was 100% in their OODA Loop when he did this. He called out exactly what they were going to do which took away much of the "OMG, we're all going to die!" hoped for impact and turned it to "This again, what about Delta?".

The last part is chaos. All the visible players (Wood, Powell, Lindell, even Trump) are chaos, the noise noted by u/MNisahellhole . They keep putting out things that may be reacted on. But the real meat seems to be coming from Flynn. This is amazing to watch.