This film is part of the Doctor Aybolit series.

Description:

When the cannibal buccaneer Barmaley arrives in Africa to feast on little kids, the animals ask kind doctor Aybolit ("Ow-It-Hurts") to rescue them. But Aybolit has a patient, so two children go instead. Based on the poem by Chukovsky.

Chukovsky originally wrote the children's poem in 1925 (it can be read here). It included his beloved "Doctor Aybolit" character, who was himself loosely based on English writer Hugh John Lofting's "Doctor Dolittle" (1920).

Like the first cartoon featuring the doctor, this one was originally made in colour, using the native Soviet 3-colour technique by Mershin. Unfortunately, the colour version is not known to have survived (likely destroyed or lost in WW2).

The first video above has more of the picture in the frame, but has a logo over part of the image.