Pretty much per title. Downloading Hulu series from D+ with DoVi results in error 609 for every episode if the series came from Hulu, e. g. Saint X.
Might or might not be related to https://forum.dvdfab.cn/forum/streamfab-support/streamfab/462464-6233-truncates-some-limited-to-hulu-titles-downloads-silently#post462464
