That video is absolutely nuts! I love that there are so many videos of people with the kind of skill, although normally they use a 250 quad for that kind of thing.
Back on topic, I really would recommend the phantoms as well if you're looking to capture aerial footage. I've gone the DIY route myself because I like to tinker and buy specific parts and slowly build it up, but that means that everything is sub-optimal. The phantoms are amazing in comparison, especially with how they deal with things like gusts of wind, and the gimbals are perfectly balanced so when you combine all of that the video does seem to be particularly stable.
The DIY quad I've built is very similar in performance to a friend of mine's quad which he bought RTF. I can't remember the brand I'm afraid, but it seems to be very similar in components to mine, and he suffers with the same slight wobbles as I do in flight. I will say though, for stable video, the bigger the better! I built an 800mm frame for a friend using the Naza M lite, same as my quad but bigger, and his is beautifully stable.