This one is interesting because it’s both videogame-lo-fi and fat at the same time. Try this:
Oscillator: Sine wave
Distortion: Overdrive-style. Something warm, and tube-like. Turn it up until the sine wave starts to sound like a warm and kind-of-dirty square.
Voices: Poly. Usually, a bass would be mono. But occasionally it sounds like the patch distorts a bit, which I think is happening because the bass is played in an intentionally sloppy manner, allowing occasional notes to overlap, which then overdrives the distortion.
Portamento: The pitch is kind of bendy, which I think is coming from portamento. You’ll need a synth that allows for portamento in poly mode. Sylenth1 and Serum come to mind. Just a bit of portamento, so you sort-of hear it once in a while.
The only thing missing from the above is something to make it sound lo-fi. Maybe a vinyl or tape-style plug-in? The whole track has that lo-fi vibe so maybe he’s running the whole thing through something like that.