Very interesting and varied impressions of a busy federal railway line 👍 The combination of old reception buildings from the time when the railway was first built with modern trains was convincing - the final sequence with the evening atmosphere in Celle station with the ringing of the church bells and the final hum of the engines of the departing ICE was particularly successful... 🤗😍🔥
I wanted to suggest you to visit Germany's most busy line: Frankfurt-Mannheim, also called "Riedbahn". Sadly they closed this line until December for general renovation
As much as I like your films mostly: Some of the filming locations looking at least in film as far to close to tracks or even on tracks itself. This provokes - if one engineer reports it to dispatcher all trains to run on sight and will causing severe delays until federal police catches one. A nice angle should never be a reason to provoke run on sight, honking trains also are an indicator that some locations were the wrong one and to close where no one should standing. I know in former Yugoslavia rail staff is quite relaxed about people in and on tracks, but that's not the case for Germany.