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.
There sample is from house sample pack, so it makes this beat very original and unique!
Sample pack Sample Magic - Deep Melodic Tech-House 2
Loop name dmth2_kit5_mvp_full_loop_124_Fmin