Slak-Dude had an interesting idea Sulla with his greatest thank battles link from YouTube,
I don't know if those would be very popular here or not. Maybe an area for armor. There is a section on Youtube for example that describes every German Panzer is excellent detail, thorough explanation of development, design and use in action. They are about 45m each in length and think there are like 6-8 of them.
Just many, many of them not sure as mentioned would be popular enough to link in one spot, though might be helpful. I have many myself over the years of both WW1 and 2 documentaries if they would be of any use.