Very enjoyable video! I wonder why that green IC loco is "top and tailing" with the steam one. Surely that steam engine is capable of drawing that train. I do hope it's not some stupid 'elf-and-safety requirement.
It could be so that they’re not propelling the train. Some railways actually prohibit that. Also it does save time running round at each end of the run. That’s quite a chore on short lines. You spend more time running round than running the train.