But the real screen refresh rates are 50 Hz for PAL and 60 Hz for NTSC. You can perfectly see a video with higher framerates if your input device (a camcorder, a TV signal, a computer gfx card) can or could output at those rates.
The NTSC system yields a nearly flicker-free image at its approximately 59.94 hertz (nominally 60 Hz/100.1%) refresh frequency. The refresh compares favorably to the 50 Hz refresh rate of the PAL and SECAM video formats used in Europe