I saw that video before, and I'm still confuzzled.
There should be more & better explanations of the gear being driven through the effect. That little thing that looks like a toy pocket calculator is a tiny, inexpensive Synth, made by Teenage Engineering. We never even see the MicroBrute, an Analog MonoSynth, and there's no explanation of how the Drum Machine (Roland?) is driving the mini-Synth.
From what I can see and hear, the Pulsar seems to be a combination of a Sequenced Tremolo, with an Attack Delay. You could very likely work up a Patch like this in a good Multi-FX processor, with some effort.