If you don't want a subscription, check Pluto TV. This free, ad-supported streaming service often has a "Classic TV" or "Sitcom" channel that runs The Brady Bunch in a linear TV format, or on-demand options.
In the meantime, here's a for a TV show write-up you can adapt once you confirm the details: wwwetv show bronacom full
If you prefer not to pay for a subscription, several legal platforms offer free content supported by advertisements: If you don't want a subscription, check Pluto TV