vfr.PPL - Höhenmessung in der Luftfahrt

Welcome to the second episode of vfr.PPL! WARNING: There are two minor errors in this video, which I have corrected with "indicator pop-ups." However, these will only be displayed correctly on a PC or Mac. Today we'd like to discuss the topic of altimeter measurement. How does an altimeter work? How can altitude be calculated? Why do we even need it?