The summary might look something like this:
The video is a tutorial on how to play music by ear using the concept of tonality and chord families. The speaker explains that each key has a set of chords that belong to the same family and have different functions and attractions. He focuses on the major tonality and the most used keys, and shows how to identify the first, fifth, fourth and sixth degrees of each key, which are the most common chords in many songs. He also gives examples of songs that use these chords in different musical styles, and encourages the viewers to experiment with different sequences and cadences. He also talks about the importance of changing the key according to one's voice and not comparing one's music with others. He says that extensions like seventh and ninth chords do not change the function of the chords, but only add color. He ends by asking for likes, comments and subscriptions.
Here are some key facts extracted from the text:
1. The text is about how to play music by ear using tonality and cadence.
2. Tonality is an organization of chords that belong to the same family and have an attraction over others.
3. The most common tonality is the major tonality, which has seven degrees or steps, each with a chord.
4. The first degree and the fifth degree are the most important chords in the tonality, as they have a main function of preparation and resolution.
5. The fourth degree is the next most common chord, and it can be used to break the harmonic movement between the first and fifth degrees.
6. The sixth degree is also frequently used, especially in a cadence of 1-5-6-4, which is a popular pattern in many songs.
7. The second and third degrees are less common, but they can also be used to create different cadences or patterns.
8. The seventh degree is usually diminished and can be ignored for now.
9. The chords can be transposed to different keys or tones, depending on the voice or preference of the musician.
10. The chords can also have extensions, such as sevenths or ninths, but they do not change the function of the chord, only add color or brightness.