Thank you very much for posting this video. My grandfather, his brother, their nephews, an uncle of mine, and so on, were all railway employees, so I grew up with the train fascination. Since I am a 1955er, as a kid I still could travel on steam trains. For more information about the DB-103 look here: en.wikipedia.org/wiki/DB_Class_103 It was a very fast and powerful engine, up to 270 km/h in tests (not on normal railway lines); max power about 7440 kw or almost 10 thousand hp.
That was the official colour of the former so-called Trans Europa Express series, nowadays called ICE. That locomotive was originally called E (E from Electric) 03. You find more information here: en.wikipedia.org/wiki/DB_Class_103
