I don't think the title ( edit: of the thread merged into this one! ) is accurate. Starting at 16:04, they say that they merely claim that the TV has the capability to be used as a listening device. In the first 34 minutes, they don't seem to show that LG are actually recording audio from the surroundings (only from the content playing) and after that they start investigating whether you could record audio if you tak…
> So the video doesn't seem to support the claim in the article that "LG smart TVs continuously [...] log microphone audio while appearing to be turned off".
While it is a bit unclear as to whether the logging and transmitting of audio is happening[1], without hacking the device, they were also quite clear that they made it extremely difficult (if not impossible) to MITM certain encrypted communications on their consumer devices. Combining that with claims they make about advertising makes LG's actions highly suspect.
While the video is quite clear that they are not saying LG is doing this (for legal reasons), the set out to prove the capabilities are there and the privacy related configuration options are very weak. For example: the microphone switch only controls one of the onboard microphones. Even if it physically cut off all of the microphones, there are other vectors that could only be software controlled (such as voice enabled remote controls).
Either way, whether it is LG or a third party, the capability to log and transmit audio can certainly be exploited.
Perhaps it is time we start considering whether we should do something just because it can be done. That is to say: do we really need to control a television by voice, or have other features that require a microphone, just because adding a microphone is cheap and there is enough compute to process the data?
[1] I got the impression they were claiming that the audio was recorded and stored on device. They simply could not prove it was sent to LG.