Do the LED's in the video represent the output of the port?
You will need to post your full code and compiler and version of compiler, is it MikroC?
You will also need to provide a description of what you are trying to achieve, i.e, PORTC BIT 0 fade to PORTC BIT 1, PORTC BIT 1 fade to PORTC BIT 2 etc.
Your fade sequence looks like from 00000001 to 00000010 then from 00000010 to 00000100 then from 00000100 to 00000001, so PORTC bit 0 to bit 1, to bit 2, then back to bit 0, is this correct?
I'm not quite sure how you are "fading" are you using PWM?