Reading an online video

I am working on an application that requires me to read a streaming video, for example, from Youtube. Is it possible to do this? As a first step, I'll like to know the video size in terms of number of rows and columns in the video and the frame rate. Then, I want to read the video in frame-by-frame and analyze the frames. I may also want to access the video starting at a specified frame number, or the time when the frame appears (the last can be done if I know the frame number and frame rate). Any suggestions?