Few things mixed up here maybe? ARC stands for audio return channel, so the Amp only gets fed and hence only supports audio, not video. Yes, you can have a video playing on your TV, but it’s only the audio that is then fed to the Amp’s HDMI ARC input.
The use if the WiiM app is entirely separate and I don‘t believe it can access video files and extract just the audio to play on a WiiM device - I think this question has turned up frequently in a slightly different guise re casting from the YouTube app
Thank you. I understood.
Forgive me for one more embarrassing question.
The WiiM AMP is listed as "Alexa built-in". Is this different from other WiiM products (Work with Alexa)? Or is it practically the same?