Chat Noir

That's true. The YouTube ones are frequently taken down, though, because of copyright. Kisscartoon doesn't seem to do that.

This is also true. On the Nickelodeon app if you click xfinity as your provider it doesn't require account details and you can watch several of the English (dubbed) episodes there.

Hmm. Good to know. I watched them all in French on YouTube a month and a half ago but they seem to have all been taken down. If you can, I recommend the French because it sounds nicer.