added back docstring changes in video.py
added back docstring changes in video.py

cathalmccabe/PYNQ,Xilinx/PYNQ,VectorBlox/PYNQ,yunqu/PYNQ,cathalmccabe/PYNQ,JorisBolsens/PYNQ,yunqu/PYNQ,yunqu/PYNQ,schelleg/PYNQ,JorisBolsens/PYNQ,schelleg/PYNQ,VectorBlox/PYNQ,yunqu/PYNQ,Xilinx/PYNQ,schelleg/PYNQ,cathalmccabe/PYNQ,cathalmccabe/PYNQ,JorisBolsens/PYNQ,schelleg/PYNQ,VectorBlox/PYNQ,schelleg/PYNQ,Xilinx/PYNQ,cathalmccabe/PYNQ,VectorBlox/PYNQ,yunqu/PYNQ,JorisBolsens/PYNQ,cathalmccabe/PYNQ,JorisBolsens/PYNQ,Xilinx/PYNQ,VectorBlox/PYNQ,Xilinx/PYNQ