This video covers the benefits of Time-Frequency domain representation, the fundamentals of the Short-Time Fourier Transform (STFT) and the influence of the window function on the spectrogram.
The explanation part on the FFT uses a modified version of 3Blue1Brown's video on "But what is the Fourier Transform? A visual introduction." https://youtu.be/spUNpyF58BY
Sound by SoundsExciting: https://freesound.org/people/SoundsExciting/sounds/240318/.
By Anna Leschanowsky, Wolfgang Mack, Emanuël Habets