Stephen Colbert’s sign-off as the host of the CBS “The Late ⁠Show” ⁠may signal the end of a historic TV franchise, ⁠but the late-night tradition is far from dead.

CBS has explained why it issued online takedown notices for Stephen Colbert’s first TV appearance since the company axed The Late Show.

After wrapping the final episode of “The Late Show With Stephen Colbert,” which was canceled after 11 years, Colbert made a surprise appearance taking over a community access program in Michigan calle...