I agree with the others that although he seems to have Basenji in him - his head is def. not Basenji.
As for the leg I'd have it amputated if it troubles him - He'll cope with 3 legs I'm sure, but certainly consult a specialist first. Please keep us updated.
Great video! We love to tease Manah when she's trying to jump on the bed at nite. We push her off and she leaps back up, runs in circles and makes her baroo sound; Basenji's are the best!