A free VPN can work with 123Movies, but you may encounter some problems. First, most free VPNs have limited servers, so you may be unable to unblock 123Movies in some regions. Additionally, limited servers mean more overcrowding which results in slower speeds. Likewise, free VPNs lack security features like ad and malware blockers, so you’ll have to deal with constant ad interruptions. Finally, your IP may not be well hidden when using free VPNs, so your ISP can throttle your speeds and may report you to the relevant authorities for copyright infringement.