I bet at the very beginning (00:55) he was hoping the entire crowd would start singing, but when they didn't, he handled it very well, great showmanship. At least, that is what I think.
@HojoOSanagi Oh, you must have misunderstood what I meant. At :55, It seemed he wanted the crowd to start what they began doing at 2:20, I didn't mean sing along as in sing along, rather chant the "chorus". Part of my reasoning was him becking them on.
@gsruler Why would he ever expect a Dutch audience to sing along to a Norwegian song sung at such a fast tempo and in an unusual dialect? I think a lot of Norwegians would have trouble singing along to this song, let alone a Nederlander.