True, but thankfully there are a lot of choices in that space, and it’s constantly growing. And if there aren’t, a lot of times it’s possible to make one (or buy someone’s) using an esp32 or similar. Zigbee, zwave, and matter devices should all be possible to run local only.
Even better, when they film vertically, and then encode it to widescreen. Ensuring that no matter how you view it on a phone it’s microscopic.