I just found a nice cab view of the narrow gauge Children's Railway running in the mountains near Budapest, Hungary:
(the line is run for and by kids, only the drivers are adults, usually older, retired drivers)
https://www.youtube.com/watch?v=5nRBOoAbUzQ
(the train the camera is on is an old DMU, but one of the steam locomotives and a few of the normal diesel sets could be seen, the line has a mix of every kind of signal and railway interlocking equipment ever used on normal Hungarian National Railways lines, which is great for training purposes)