Hi @Labby,
Thanks for the inquiry, and welcome to the Roku Community!
Please be advised that if your Vizio TV lacks an HDMI port, you cannot directly connect a Roku Express to it as Roku devices exclusively use HDMI connections; therefore, you would need to purchase an external device like an HDMI to composite video converter box to connect the Roku to your TV's available ports, like composite video (yellow, white, red) cables.
We hope that's helpful, Happy Streaming!
Kind regards,
John
John
Roku Community Moderator