By the letter of the law, Bull Frog didn't do anything illegal, even if this is considered "concealed carry" (despite the firearm being plainly visible).
However, considering that some DA's seek to redefine "private property" as exclusive of any place "open to public access" (e.g. your front yard), I recommend discretion if you're going to carry concealed outside of the walls of your home.
12026. (a) Section 12025 shall not apply to or affect any citizen of the United States or legal resident over the age of 18 years who resides or is temporarily within this state, and who is not within the excepted classes prescribed by Section 12021 or 12021.1 of this code or Section 8100 or 8103 of the Welfare and Institutions Code, who carries, either openly or concealed, anywhere within the citizen' s or legal resident's place of residence, place of business, or on private property owned or lawfully possessed by the citizen or legal resident any pistol, revolver, or other firearm capable of being concealed upon the person.