yes that is my theory too -

they announced the rehearsal was canceled - as a bluff to improve security

shot a lot of footage over 2 days - 2 "cancelled" rehearsals - got what they needed - spliced it together and on the day the real inauguration was pbly not aired at all.... or they ran it - 5 minutes delayed - and they had cuts they put into the live feed as it went - so if there were mistakes live, they could cut out

they were also probably running audio from the rehearsals. tricky to do....

that can explain how it landed at 11.48am instead of starting at midday, cos the live one was a mess of Biden flubs and they went to the spliced recorded rehearsal version.

or if the live was was running 5-10 minutes delayed, they started 5-10 minutes early and used the live part for the swearing in - and landed too early.

you also have to see the two girls in pink changing positions - these are not pro actors that are fully prepared and rehearsed and they only basically have 2-3 takes to get it right so on the fly - it's not easy to get full production quality.

it also explains the low energy, Clinton nodding off and people a bit transparent and stressed because they thought it was just a rehearsal so they weren't making an effort.