Thank you for the links.
I download and look to 60fps.mkv frame-by-frame. It has really 60 different frames in second. No duplicated frames. This video is already smoothed to 60 fps.
The problem is format of video. It encoded to AVC 10bit YUV 4:4:4. GPU acceleration of decoding is not worked to this format, so my core i5 gives me 100% CPU load with video stops while playing.
If reencode this video to AVC 8bit YUV 4:2:0 is will must work normal with GPU acceleration of decoding. And smoothly even without SVP.