Having now survived about 5 weeks commuting here in Naples, I can report that filtering is a joy. Indeed, I have one really bad section and I notice that cars actually move away from you when they can, allowing a little bit more room. There is no anger, no raised voices and no one is trying to 'get you'. The traffic flows and the average car driver respects cyclists. There are dangers and it is not all perfect. Many drivers are just dozy, on their phone or just not paying attention and you have to be more aware of what is around you than in UK. But overall, I like it. 14 miles each way is not bad for the legs. So, I have watched these vids and am pleased that I no longer have the angry British driver to cope with.