Digital copies are available for a small fee on major storefronts: Watch Barbershop: The Next Cut | Prime Video - Amazon.com
(available as a standalone app or an Amazon Prime add-on channel) Philo DIRECTV Stream 📽️ Rent or Buy You searched for Barbershop the next cut - myflixer
If you already have a subscription to these services, you can watch it at no extra cost: Digital copies are available for a small fee