I haven't experimented with recording directly to the same machine I'm playing clips from. Seems like a bad idea though, Yiour storage drive is already working hard throwing content into Arena, displaying it smoothly is fine (the GPU takes care of that) but recording it at the same time means a lot ...

An external recorder would probably give the ultimate results. We use Blackmagic Hyperdecks, and also Atomos recorders. These accept hdmi, sdi, or both, and can record in protea codec for stunning results. Monster file sizes though!

Have you been logging into my webcam... that's a surprisingly good caricature of me...

Apologies for the mis-info. I only generally use the feature when using projectors, and since we got LED wall I hardly ever use projectors any more.

This already exists (kind of)

https://resolume.com/manual/en/r5/outputtransformation

Scroll down and check out the bit entitled Show Grid.

You have to turn this on and off per slice. But it's still useful.

.Mov is the container. DXV is the codec used within.

V6.0 sneaky peeky!?! Very jealous!

I'm guessing some config of external converters. Three HDMI outputs... Hdmi to 6gsdi, then an sdi multiplexer to give four hd-sdi's per original source.

Black magic mini recorder. Hdmi or SDI input. Cheap as expensive chips.

Why not just run your MBP through the Datapath? You could have a lot of screen real estate very quickly!

16:3. Unless you mean it's 6' off the ground...