Sleeper car train trip to and from Romanian seaside, the Black Sea city of Constanta [4k]

A trip to and a trip from the Romanian seaside, the Black Sea city of Constanta. The trip is done on a sleeper car train, with sadly dirty windows on the Romanian train provider CFR. But, along the way, one can see nice landscapes, animals (like cows and storks), the famous Anghel Saligny train bridge over the Danube, train stations, and many trains of course.