The mizzen unfurlling exercise looks like a mad knife thrower, hurling knives at an imaginary target !
You have a vang on your mizzen boom ? Do you have a pic of it ?
I have thought about putting one on, not because of furling issues, but to keep the boom down when gybing so it doesn't ride up the mizzen backstays. Only issue is that I store my dink upside down on the aft cabin roof when passage making.