Translating the Paul Graham video to Croatian works surprisingly well.

(As a non-native speaker) several bits of the Japanese transcription were just Japanese-sounding noise, and the prosody was completely all over the place in the bits that were actually Japanese. The dub does get across most of the things being talked about, but I wouldn't consider it an acceptable dub (even for most of the bits where it is actually in Japanese).

I wonder if reason is that the dubbing works better between more similar languages and struggles when dealing with disparate languages. I don't speak Chinese or Korean, but it would be interesting to see how well their dubs are.

Can you do another video into Japanese, to see if it's just an issue with the Paul Graham video? Also, how about translating from another language to English?

Good idea, added a Putin video translated from Russian: https://www.youtube.com/watch?v=YSkjQJcqaFo

I love the slow whispered "Thaaank Yooooouuuu" at :10.

Here's another example:

Steve Jobs on death | Walter Isaacson and Lex Fridman (EN->JP): https://www.youtube.com/watch?v=6YiJLDhcWSI

Maybe it does better on longer videos, but as someone who is fairly well-versed in Japanese this one was not a good result either. There is also a bit of wonkiness in this one, where in the dub Lex says some of Walter's lines and vice-versa, and at one point both of them repeat verbatim the same exact translated phrase which doesn't correspond to anything said in the original.

Translating the Musk video to french is weird. What's interesting is that sometimes protagonists speak with an accent from Quebec, and sometimes with kind of an old school voice from some old french movie. There's a laugh in the sequence, which is translated with again some audio quality that belongs to an old french movie.

Back to the Future to Finnish: https://www.youtube.com/watch?v=fvvqUv6YYhc

I laughed because the voices are so out there, and then it made two little funny mistakes that caught me off guard when I was already laughing, so I could only switch to crying at that point.

Here's Boris Johnson speaking German. It really does sound like his voice:

https://youtu.be/J4nxHqblzKA

I wonder if they're breaking Youtube's (and others) TOS by downloading the videos to work their AI magic on them?