Warning: I am not a railway modeler, but I decided to take a chance on renting this DVD when I found it whilst searching for info on soldering. I'm delighted that I did. I've watched the DVD end-to-end 3 times and dipped in to specific spots on numerous occasions. More importantly, I have successfully used the techniques to finally get decent results using my long-suffering soldering iron.
The presenter, Tony Wright, runs through the processes for soldering brass and white metals to themselves and each other. He does this in a very clear and methodical manner.
Another positive feature of this presentation is that there is no sense of urgency. Things are done at the pace that they need to be done and Mr. Wright is not afraid of repeating important points. The clarity of the pictures and sound quality, along with the patient delivery, makes for a great teaching tool. At the end of it you will know what tools, chemicals and techniques to use to get strong, neat bonds.
On top of all that the whole thing is also very watchable. Tony's attitude to HSE is refreshingly old-fashioned and the DVD is punctuated with various subtitled warnings not to copy teacher.
I can't comment on the railway aspects of the DVD, but the business of teaching soldering would be clear to anyone who got this DVD. Highly recommended.