I have been holding onto these videos for a number of months now. It is some time since I have looked at those them, four in total, and they are all lengthy from a time point of view. However, the information provided is in English, it is comprehensive, and certainly worthwhile to retain in our Library Section. Take the time to look - worthwhile. Regards Styria
https://www.youtube.com/watch?v=CJEE8JbzN8U&t=67s
https://www.youtube.com/watch?v=CJEE8JbzN8U&t=67s