What is the officer's dash cam or body cam going to show?

The report is a narrative written after the fact by someone who had already concluded you were impaired. The video is a recording made during. They diverge more often than you'd expect, and that divergence is among the most useful things in a DUI defense.

What video regularly shows that reports omit: clear speech in a report describing slurring, steady walking to the rear of the vehicle, a sloped or gravel surface where the exercises were performed, instructions given incorrectly or too quickly, an observation period shorter than claimed, and the actual phrasing of requests and warnings.

Things worth knowing about the footage itself. Cameras have pre-event buffers that may capture moments before activation. Audio sometimes begins later than video. And multiple officers mean multiple angles — not all of which are produced unless someone asks specifically.