It is pretty logical if they really want to see it. Видеть is also possible (for this verb), however, it sounds more bookish and less enthusiastic. Maybe it's just me but увидеть sounds a tad bit more as if they actively wanted to see something and were even ready to make some effort to go and see it.
However, with watching a film or listening to music it is usually посмотреть and послушать. Using "хочу смотреть/слушать" if you in fact want to watch or listen to something specific would sound odd to a native.
I think, the difference is the rather vague nature of «видеть» and the fact that «увидеть» is about the moment when you finally start seeing something or manage to do so. Listening and watching are usually initiated by you and (if we are talking about films and music) naturally have an endpoint.
That is dubious. In the truly ancient times when the Β "beta" meant "b" but in Koine Greek it already meant "v" (hence the meaning of cyrillic В "vede") so it is very unclear why it would be borrowed as *korabъ.
Rejzek's Czech etymological dictionary list the origin of korabъ as unclear, possibly related to Slavic korbъ (a basket). Borrowing from Greek karabos, karabion is unlikely due to the late and clearly secondary meaning of this word as "a boat" (originally meaning "cancer") but cannot be completely excluded.
The complete sentence sounds as it should (except a few mildly odd intonation jumps). The pronunciations of separate words might be unreliable when the stress or the use of Ё depends on context, which Duolingo does not provide when sending a query to the TTS API.
It is, basically the same in English: the TTS might pronounce "I've never ever read about that" correctly but fail to say "read" from this sentence correctly on its own.
Всё is the nominative/accusative neuter singular of весь, which is either an indefinite pronoun (as here) or an adjective, depending on usage.
Все is nominative/inanimate accusative plural of весь.
I still don't know why "everything" is singular and "everyone" is plural, but that's the way it is.