Awesome video! Symbiotic relationships are my favorite thing about my 35 gallon (hex) tank. My YWG and tiger pistol are so fun to watch. I've only had them for about a week, but they've (well, the shrimp has, with his faithful guardian standing watch) tunneled all over tank from one rock to another. Did yours eventually settle down in a consistent spot or keep meandering about the tank?
Speaking of symbiosis, I also have a cleaner shrimp that is pretty awesome at picking the place and the fish clean. I also plan on getting a bicolor angel and a cleaner wrasse as well (another cool symbiotic relationship), though I fear the cleaner will not have enough food with the few fish that are in my tank. Some cleaners also will eat a variety of other food (such as mysis or F1), but I know that they oftentimes do not and can die from lack of food. (Not to steal the thread, but) Any suggestions/comments on this?