The problems become more apparent now that it's spaced out. Working backwards from the most obvious things, there are problems with the trajectory of the ball - towards the end it kind of lurches forward before coming to a very sudden halt which looks a bit odd. The ball shouldn't stop moving as soon as the last bounce occurs - it should probably still roll around or continue moving across the floor for just a little bit before slowing to a stop.
The timing in general seems to be a problem. The ball, to me, looks a bit weighty - it still doesn't have the energy and power of an actual tennis ball. I still don't think that it bounces high enough - potentially, it could just be a timing thing. If I increase the speed of its ascension it might look a little better. Tennis balls are fairly light and springy - they don't tend to fall too fast but bounce off surfaces with considerable force and speed, so I definitely think it needs to accelerate faster in order to capture that "springiness."