I think there are one too many dimensions to this data. I know they collect statistics on both approval and disapproval, but for the most part approval + disapproval = constant, so I think it would be more informative to simply plot something like (approval - disapproval) on the y-axis and time on the x-axis. Then you could see the trends and compare different presidents without having to watch the animation once for…
Note that we're looking at days 0 - 1,000, that is, less than a 3-year range. This completely overlooks the second term of 2-term presidents. So, for example, we're seeing GWB's post-9/11 boom but not his later ignominy, and we're not seeing Reagan after he got the economy sorted.