We can track many distinctive clouds throughout the scenario, so let me say those clouds do not move particularly fast, except at certain junctures, where they show they've moved "very fast." That reminds me of something my mother told me when I was a teenager. She said, "Babies take 9 months to get here. Except a couple's first baby; sometimes those take just a few months." If you get my mother's and the clouds' drift, there's clearly been video cut out between these frames, despite Puentes' misleading claims of having "just kept on rolling."
Ok, I do believe he kept on rolling throughout. The NTSB simply did by no means distribute all the video Puentes took.
Oops, I called that cloud movement exactly backwards. It should have said, “east-to-west.”