Hi Morti,
Both episodes are incorrect. The series (as listed) should be a two-part live action drama. It was a 2012 British production starring some big name actors like Eddie Izzard, Elijah Wood, Donald Sutherland, etc. Each episode should run for approximately 1 hr 30 mins (as far as I can gather from IMDB and Wikipedia), giving a total of 3 hours. It was produced by BSkyB for the UK channel Sky 1, if that helps.
The two episodes which are currently on the site are both from an animated series called 'L'isola del Tesoro', produced in Italy by Rai Fiction/Mondo TV, around 2016. They each have a far shorter run time of approx 23 mins. (I believe these are the first two episodes from that Italian animated series, which ran for 26 episodes in total.)
Incidentally, I've just discovered (literally whilst typing this message) that the full 3 hour version of the 2012 series is up on Youtube as a single file, (ie. both episodes joined together). I don't know if that's going to be of much use to you, but it might help you track down usable files for the correct version. The link is: https://www.youtube.com/watch?v=XFGkAJmHKps
Hope this helps.
All the best,
Rasko.