I think it's OK to cite this particular item from Newsbusters. The very first time that I watched the ABC video, I too was suspicious of their on-screen logo covering up much of the relevant part of the video. We all know that the logo covers up part of the video, and the Newsbusters article just verifies what we already knew anyway. I don't think the standards of verifiability for something so obvious need to be as high as for other kinds of claims. I support inclusion of the Newsbusters source.