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