I'm a bit tired of people using this kind of Cyan/Orange lut on every A7 videos.
Also, this video is quite noisy for some reasons, not sure if this is part of the "experiment"
Some folks prefer to pick up gear in person because... camera tests. Getting your equipment in person is always better and avoid delays on set... There should be somekind of "request camera tests" options. Also, being an owner, I wouldn't want to ship an Alexa or a Red Epic just like that. I want to meet the user in person and make sure they know what they are doing. (no offense, but you never know).
The compression (or perspective and proportion) that you get from a 28mm lens will not look the same than the one you get from a 50mm lens. If you use a smaller sensor size that changes your field of view with the 28mm, you'll still get the same compression, regardless of the sensor size. In the end, what you really do is simply using the center part of your image 'cause that's what your sensor sees.
Red Raven is just shy of S35. 35mm focal is the standard 39 ish degree field of view on S35 sensor. (A 50mm focal is the standard 39 ish degree field of view on a fullframe sensor.) So maybe looks into lens from the starting point that a 30mm will be your standard 39 degree on the Red Raven.
Oh yes! Crop factor. I manage a rental house and I always ask my client what format are they used to work with (before looking at different lens options.) A lot of client (dp, 1st ac) don't know anything else than S35 or S16. Then, if their director wants a Red Epic Dragon shooting at 6K, I'll be telling them that a 35mm lens will be quite wide at this format and that if they go in lower resolution for higher fps, it will also change the field of view. (then fun explanations starts!)
He probably meant going in and out of the water in a smooth way.