Personally, I do not have a long list of subscribers, since I am busier on making YouTube videos myself, but I have a few. Some include Eric's Trains, Sam's Trains, Toy Man Television, The Steam Channel, and TSG Multimedia.
If you want to check out my channel here is a link: https://www.youtube.com/channe...B6xHBZ03NP0P4ujR1cAA