I had a look at what my router says: https://imgur.com/a/u40lr6A
Not sure what I’m seeing there, though.
Before switching away (or not) from 36 I had a look here: List of WLAN channels - Wikipedia
Whether or not I’m still on channel 36, fact of the matter is that the Vero now connects to 5G without fail, which solves the problem of sound being out of sync with the video. Last two nights the Vero and the bluetooth sound have played very nicely together :-), so as such I’m a happy bunny.