Thank you all for the comments
The style sounds suspiciously like the onboard ContempPop, the organ sound in the style intro/ending is Cool! Whiter Bars Fast, although it switches to Cool! Full Rocker for the main Variations.
I indeed used ContempPop with the standard OTS settings. In 90% of my video's i just use preset sounds, so everyone is capable of reproducing what i do
Best Regards,
Joost