Is BanG Dream! Film Live hentai?
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

Movie · 2019 · 1 episodes · PG-13 - Teens 13 or older
Music
Five bands all have their sights set on stardom as they take the stage in the first theatrical film of the Bang Dream series. (Source: TMDB)
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