This film combines documentary, travelogue-style footage with dramatic 'reconstructions' of the mutiny on the Bounty.
Much of it is silent, ie with music only, as I recall. It's very much a primitive sound-movie, in which the director is still working with silent movie techniques, although not in any sophisticated way.
The acting in the dramatic scenes is uniformly abysmal; very 'stagey' acting even by the more experienced performers. The only interest is in seeing Errol Flynn in his first movie role. He's dreadful: very wooden delivery; as stiff as a parody of amateur theatricals, with no star presence whatsoever.
But I find it of interest for this very reason. It shows that even a superstar like Errol Flynn didn't hatch from the egg fully formed, and that however bad you are to start with, there's still hope ...