Don't be afraid. There are no gruesome images in this video. I know that there are some people who have a very shallow threshold for pain. They can't sleep at night; images of butchered or abused animals haunt them. Although I always look at those gut-wrenching images, primarily to acknowledge the suffering of the animals, I don't blame you for protecting your sanity.
Here is a video that is very well-done. It contains scenes of captive animal performances but none of the blood and gore. This is a video you can send to your friends who are still sitting in darkness, those who believe that performing animals are also having a great time, those who insist that the circus is wholesome family entertainment.
I'll let the video presentation speak for itself. And please, do not think that captive animal performances exist only in China. It is a global problem. We have our own home-grown example in the Ringling Bros Barnum & Bailey Circus.