With this chip the only external parts you need are the two filter caps and an inductor. It's about the most simple SMPS you can build. If you were to build it from discrete components, there would be much more to do.
Most likely, the chip is not behaving exactly as expected and has more voltage ripple than the video system can tolerate. Adding a newer larger cap, or an additional cap (on the output) could help a lot.
Hayato: I know it's there. I'm not sure what you were pointing out? I was talking generically about the chip itself, not the specific charger.