Raz, I'm not sure you saw it right. Neither one of us was there, but let you give me my "think" on it after watching your video.
Moving violation...failure to yield (stop)...45 minute low-speed pursuit...suspect gets out and walks towards a clinic with other people in it. Looks like he finally stops and starts to comply with verbal commands. The book here is pretty common. Get the suspect into a kneeling or prone position; approach with both lethal and less-than-lethal cover; and apprehend. But here's where it goes off-script...
Suspect is kneeling, and then stands up. I'd bet money nobody told him to do that. In other words, he was most likely no longer compliant. Thus, hair missile. They're too far away for a Taser shot, so...dog it is.
Like I said, I wasn't there, but I've been in a few of those situations, and you never...ever...tell the suspect to "stand back up".
Not defending what they did, but if he was no longer compliant (as it appears), then deploying the K9 was by no means excessive force in that scenario. Totality of the circumstances. Don't just stare at the last 30 seconds; watch the entire 45+ minute episode. Then decide.