Not necessarily "convincing" but the "ma-AH" aka "come here/how to speak cat" video is very cute! https://old.reddit.com/r/fixedbytheduet/comments/1os4uid/hav...

I tried it on my cat and it worked although she may have just come over to investigate why I was making weird noises at her!

The rest of the original guy's "how to speak cat" series is also fun.

https://www.youtube.com/watch?v=Qyc7Krs0Fi8

I’ve seen some BilliSpeaks videos that absolutely convince me cats have more language capabilities than previously thought.

When you say “convincing” what are you looking for? Do you think these youtubers are just using editing tricks and traps to convince a gullible internet? Genuinely curious.

> a single convincing example

On which particular thesis?