This still depends on how much budget you plan to invest. Do you watch wedding videos? The low-budget scheme is to buy a second-hand Panasonic M43 mirrorless camera system. If the requirements are not high, such as 1080, second-hand GH4 is enough. If the requirements are high, successor models such as GH5 and GH6 can be considered, and the lens is a conventional working lens. Because it is the M43 system, even the working lens is cheaper and lighter.