1. The lick in the YT clip consists of notes
C D Eb and Bb
The lick has also
F.
Now about the chord - the harmonic foundation for the melody.
The chord voicings add different "flavors," different mood.
It's about the background (the harmonic background) that the melody is placed in.
Sometimes, one can hear(see) a person - who is listening to the music via headphones- singing some phrase, lick, or just some vocal
embellishments.
Most probably, that vocal "uhh- uhh -uhh" embellishment is so "perfectly-woven" into the harmonic background of the song/track, but...
We can hear only the person's voice producing something "
strange."


It's because, we don't hear the background - chord progression, rhythmic pattern, etc...
Yes, we have the Melody - as a
Human Being for example, but that human being needs to be dressed in clothes, or in our way, the melody should have some harmonic accompaniment.
Let's take the same melody - a person - and place it into the harmonic background - find some clothes.
How to dress - it's like a whole other country.
What shirt, what color shirt, what texture, what pants, chinos, jeans, what shoes, boots, etc...
The same thing is about the harmonic foundation - the chord progression - for this/that melody.
(N.B. We are not going to talk about a cappella.)
In your provided video with that melodic phrase, one could simply play the accompaniment as Cmin (a triad).
Another musician can play the Cmin7 chord (as in your example.)
I've tried that "lick" with the Cmin9 chord and with the Cmin11 chord.
What if a composer/arranger decides to play Cm7add(b13)?
What is some piano player decides to play the Cm6 chord???
The lick is the same, but the background - harmonic - is different, like a different dress style.
Now, let's change a little bit the harmonic background and instead of just playing Cm7, let's play it as Cm7/B7, or
Cm7/Dm7(b5),
Cm7/Gm7?
The lick is the same but the harmonic "clothes" are different.