What a wonderful video. I love trams and especially in Krakow. I visited the city in September 2021. On one particular day I purchased an all day ticket and spent hours travelling all over the system. It was a great way of seeing parts of the city that were off the beaten track, and doing some serious people watching. Like you, I really liked those vintage trams with the huge windows. I couldn't help noticing that a lot of the trams were being driven by some very attractive Polish ladies!
These Pesa trams are considered to be a load of shit because they're very unreliable, but that's not the case for all of their trams. The older Bombardiers are NGT6 and were delivered in a few slightly different versions - I think there is Mark 1, Mark 2 and Mark 3. The newer ones are NGT8.