The scale length is 24.56"
Here's a video that compares this mandocello to one of his other ones (the other one is cherry back/sides, with a cedar/cedar double-top, and a more traditional floating bridge.
Both have no sound hole, but have a sound port on the top side.
https://www.youtube.com/watch?v=hmzCn6INOU8
Yes, these both have a pickup. They make them in their own shop, but based on what they told me, they are similar to the K&K pickups (three piezo elements attached to the bridge plate).
The one playing at the beginning (before you SEE Jason Ring playing) is also the walnut one that I bought.