The base is original from the producer (chords and melodies), but is complemented with elements that complement the song that come from samplepacks, usually, vocal chops, guitars, wobbles sections, glitch effects. It is the standard in which most of producers work, in a project you will find MIDI files made by the producer, but also melodic loops.
This project contains a royalty-free sample from Splice used as the base. Fortunately, the sample has been edited so much that it is not even noticeable (sped up, different pitch, mixing and chopping).
Sample pack Chop Shop: Vintage Soul Stacks
Loop name CSV_90_vintage_soul_stack_dont_you_try_G