Do lip-syncing jokes and lip-syncing co-productions belong to the same category of works?

Belongs to. Lip-syncing jokes and lip-syncing co-productions are both completed through one's own participation, and they belong to the same category of works. But the methods of generating works are different. Lip-syncing jokes do not require their own original voice, while lip-syncing and synchronizing require the use of their own original voices to complete the work.