John Voorhees for MacStories (line breaks added for emphasis):
The sources above are the component parts of what Detail calls Scenes, which can use one or more sources to create a single-view Scene or a Combo Scene that comes in five different layouts.
That allows you to mix and match camera sources with screen-sharing sources and even other scenes into one composite video.
The result is a flexible system that can be easily adapted for video interviews, tutorials and help documentation, video conferencing apps like Zoom, and more.
Moreover, you can set up multiple scenes in advance and switch among them using keyboard shortcuts or Apple’s Shortcuts app.
I’ve had my eye on Detail for Mac for some time, and their latest Detail Duo for iPhone/iPad is intriguing too. Over on Mastodon, John and I had this back-and-forth about the update:
This is a great idea – to add onto it, you could also use the Alarm automation, set it to an “Existing” alarm, then choose one of your own Alarms and set the Sound to “None.”
That way, you can still snooze, toggle the alarm on/off regularly as needed, and avoid needing to disable the Automation each time – it’ll play Music from your Personal Automation instead of any alarm tone, headphones or not.
Otherwise, you could normally just have picked a Song in the Alarm menu – but this Automation also lets you choose playlists, radio stations, podcasts, or anything else you can think of!
Thankfully, the folks at Discord ran into this enough themselves that a solution is actually built into the application: a special 
