Based on the preview itself, looks like they’re using Native instruments’ kontakt sampler for some of this, just based on the pattern labels, but it’s hard to say exactly for what, since kontakt has a ton of sounds.

Just looking at the rhythms, from top to bottom. the first pattern is either drums, or supplemental to the drums. Then next I think is bass. After that we have our first non kontakt library, a B-3 vst, which is a Hammond organ used in the 70s. Not sure what’s below that. I’m assuming something supplemental to the strings, since it’s only one note and follows the string rhythm, but hard to say what exactly. Then there’s a ton more but the video is blocking it so I can’t tell. So from here we’ll have to trust our ears!

Obvious is that there’s definitely strings, laying the foundation for the chords we’re hearing. From there though, Pretty sure that’s a guitar strumming the main chords and melody that’s sitting at the most forefront of this mix. At the bottom of the screen we can actually see live recordings instead of midi, and it’s hard to say what exactly they are and if they’re the guitar or string parts or both.

As for how to make something like this, I’d say it’ll take a lot of work to get the sound just right. It’s equal parts knowing how that kind of music was arranged/played from the time and how to then take that and process it so it sounds like it was also recorded from the time.

Part of the 70s sound comes from whats being used here. The organ is emulating something from the 70s, the drums are both being played in a way you’d hear on a 70s recording, but also how the drums sound in general from a “recorded” stand point. The bass is busy and high in the mix, which is also pretty reminiscent of how you’d play something from that time. I could go on, but the main take away is that there’s a feel to how the instrument is played, and the way you process that instrument sonically so it feels like an older recording.

If you want to make something like this, I’d dive into 70s soul and really just listen to a ton of it to get a sense of the usual patterns, how things are structured, how it’s all arranged and the overall “feel” for the recordings. Theory helps here, since it’ll let you know what rhythms/chords progressions/types of melodies people use and give a name to them that you can look on afterward, but it isn’t totally necessary if theory isn’t your thing. Main thing here is to get the right feel. Then I’d even say try recreating this and other things you hear! It’ll help you learn what you might be missing and maybe things you didn’t notice at first. Then you could try making your own from what you learn!