Umm....ok...

There's no special techniques going on there. Also, having your intonation off is a bad thing- it means that the notes are out of tune. This can happen either by not having your intonation set up properly on your bass resulting in the notes being more and more out of tune the further you go up the neck, or by playing fretless wherein a slightly off fretting will result in an out of tune note. Once you develop your ears to hear in tune, it's actually a little painful to hear out of tune notes.
It's good that you like it, but you should be aware that he's not playing anything particularly special or different.