There are no absolutes about running LV and HV together as far as interference goes because you may or may not get interference depending on how insulated the wiring is. Depending on building codes it may or may not be ok (provided you disclose that information about your in-wall wiring at time of sell
). All you can do is try. Just keep in mind that the higher video standards (HDMI 2.1 and beyond) may be more subject to interference if you go that route in the future. Ethernet, coax, and power cord would probably be ok inside the same conduit and just run your video (HDMI, what ever) through a separate conduit for future proofing and safe, cable replacement.