The video shared on Twitter Buitengebieden shows the old man playing a song named The Moon Represents My Heart by Teresa Teng on the harmonica in a park. As two adorable geese attracted to the music come to watch the man, he could be seen squatting down for them and playing a song for them.
When you start a commercially released VHS tape, DVD, or Blu-ray Disc, they usually open with verbose, unskippable screens from the FBI or Interpol warning the viewer massive fines and time in jail can happen as a result of piracy. Many DVDs also include a PSA in the beginning about how piracy is wrong. In the most extreme cases, this segment can't be skipped... sometimes the disc can't even be stopped while it's playing. Ironically, the person who's logically most likely to see it is someone who legally paid to own a copy, because those who end up distributing these downloads like to edit them out. In Europe this can lead to three almost identical warnings in German (Germany, Austria, Switzerland), two in Dutch (The Netherlands and Belgium) at least three in French (France and Belgium and Switzerland again), two in Italian (Italy and, you guessed it, Switzerland), two in English (the UK and Ireland), a number of very similar Slavic languages as well as a number of similar warnings in the Nordic countries.
Harp & Soul by Marcus Coll is well-rated and takes about 2 hours with 47 video lessons. You will learn a little theory behind the instrument even as you put in the practice to learn the three main positions on the harmonica, the 12 bar blues, and different styles of playing it among other things.
The database of harmonica tabs still exists and lists nearly 25000 songs, each indicated by symbols for chromatic, diatonic, tremolo, and tuned octave. Each tab also displays the key and the difficulty level, so you know which one to pick according to your playing level.
The Hang is a steel, disk-shaped, harmonically tuned percussion instrument that's played with the hands. It's incredibly sensitive and dynamic; the entire disk resonates at a central frequency as your hands move around the edge, teasing the notes out.