The quality of the episodes on YouTube are not bad (certainly better than the old version that circulated on emule) but they are clearly in the wrong format (they should be fullscreen) and the guy who uploaded them has added an annoying watermark. Fortunately, the series is set to be aired on the Italian TV channel Rai Premium this fall, so hopefully someone will make a rip. It should make for a much more ideal version. Too bad it's in Italian only as this was clearly shot in English and I think most of the actors retain their own voices (Sherry Buchanan is one of the few who sounds noticeably dubbed).
I quite like the edited down feature length version. I find it very enjoyable and briskly paced but due to so much material being left out, some passages feel abrupt or confusing. The full mini series version plays more coherently and it's great to see all the "new" scenes. I especially loved all the extra stuff in the first episode, such as a better introduction of the blind sister, the murder of the sister's boyfriend (a character who was axed completely for the feature length version), the mysterious painter played by Patrizia Webley of PLAY MOTEL and MALABIMBA (another character who doesn't appear at all in edited down version) etc. But like most old TV mini series that were designed to be watched with one week between episodes, this contains the kind of exposition or padding which might not have been too noticeable at the time but which is very apparent when you're binge-watching. So I'd say the 90 minute version and the full mini-series both have their pros and cons. Still very much worth seeing. I for one like this one a lot. Great cast, some good suspense and atmospheric scuba scenes.