I always thought that people hired to pen test are white hat hackers? What is the difference to red team?

No, they just put it as background music in their videos, but didn’t actually pay for it. I would guess it constitutes fair use?

I am not sure as well, but maybe they meant “maybe an early and public disclosure increases the urgency of the fix for the developers”?

Hmm, afaik florisboard doesn’t support word suggestions at all right now. You can read up on it a bit on github but to make it short: the main dev is struggling with creating his own performant word suggestion algorithm.

Do you mean different characters/local keyboards, or different dictionaries?