Theonik
Member
In a lot of these the audio was separate to the actual film and often performed live.Would Kobu-tori have originally been a silent film? The Youtube version sounds heavily synthed.
I am not 100% sure about Kabu-tori right now. In that old anime, there was often also narration which was impromptu by a live narrator while the film played so preserved versions only use 'a script' which got re-recorded.