By the way, I think some details were missed out on that video, so I just thought I'd like to share this with you all! =)
I've seen some of you complaining about this problem, so I think it's about time you knew what was going on.
Annoyed at the grassy patch remaining quiet?
Annoyed because your chains break after a battle even though it was with the chained pokemon?
I'll give you all a solution to stop this.
NEVER reset the radar in a patch of grass which is not surrounded by eight other patches of grass. This may cause the grassy patch to remain quiet.
NEVER go into a shaking patch of grass which is not surrounded by eight other patches of grass. This may cause the normal music to play after the battle (meaning the chain broke), even if you got the chained pokemon in that battle.
Here's what I mean:
(Yeah, that screen shot was the best I could find lol)
I put a red cross on some of the patches of grass which may cause this problem because they are not surrounded by eight other patches of grass, and a blue circle giving examples of patches of grass which won't cause this problem because they have eight patches of grass surrounding them.
Bear in mind that the fewer the number of patches of grass surrounding the patch of grass you are going to use, the higher the probability that your chain will break.
I hope that helps! ^_^