We're getting reports that the video player on Watchcartoononline.io doesn't work when AdBlock is running. This is an issue with the EasyList filter list, not AdBlock itself. We have reported the issue to the list authors. Hopefully, they will tweak the filters to correct the problem.
In the meantime, the following custom filter rules get the video player working again:
Please see this article for important warnings about using custom filters and instructions if you need them.
Ads appear to be blocked better on Watchcartoononline.com. You might want to watch videos there and avoid the other site.