Agitation Techniques Part One 

Only reason to use a larger tank would be if you needed more volume for a highly diluted developer- something like Xtol 1:3 or maybe 510 Pyro 1:500- there’s a minimum requirement for a developer per roll and sometimes a single real tank with highly diluted developers pushes that minimum-- advantage of course to a small tank is you use less volume of chemistry and save $$$.

Yes spot on with a pattern tank

The problem with the Patterson tank is that the watertight lid is likely to pop off in mid-process, dumping a load of developer (or fixer) in your lap. The better practice is to not use the Patterson tank at all, but if you've already signed on and won't toss it in the bin, then stick with spinning the agitation rod and avoid inversion agitation. As to film types, as described in the video is the perfect technique for B&W. It works for color as well, but color films are designed to be processed in continuous agitation automatic systems. With the relatively fast process times for color, continuous agitation is probably preferred.