Loved the video! I didn't find it too long. It looks like they have a lot of space and ventilation and that you will have possibilities to either change things if you need, or add some more chickens. ( not that I'm telling you to

).
What kind of climate do you have ? I was wondering about using OSB panels outside but they seem to be very well sheltered in the case of your coop.
And not on the video but I would love to see more pictures of Brownie, I think she's turning out very pretty.
Do you have any news of the people you rehomed the two cockerels to by any chance ?