Great video, especially from a phone attached to the brim of your hat. It looks like unlocking it isn’t bad, like you don’t get a large drop, so long as you are quick popping it out and holding the tension (which you demonstrated doesn’t take much). The only thing I’d be nervous about would be that there is no back up to your system and going hands free. Like
@Treehopper2 said, backing this up with a hitch above your your figure 8 might be the ticket. Not saying I wouldn’t use it as you showed; however, if I did I would have my hand on the rope at all times just in case. Even the locking method that
@Brocky shows I don’t use free handed without a back up. Some of the true safety gurus would probably recommend always using a back up friction hitch of some kind no matter what.