It sounds to me like a rather plain organ with two delays and a chorus. Maybe a slight touch of vibrato. Wah wahs does more to the filter than this example. But hey, I could be completely wrong.
How about a bigger example than one chord that plays for longer than 3 seconds? If we heard more examples of the attack of the instrument–like it playing single notes, then we could probably tell you. What song is the clip from?
It sounds like a 70’s rhodes electric piano. The best version of a vsti of an electric piano is from SampleTank2–you can get a free version from their website (the way it’s “crippled” is that it lets you use only one SampleTank2 instrument per song), get the free “73 E Piano” sound. It’s a great sound. Then run it through effects.