There must be some conflicting advice out there, most everything I've read suggests a turnover of 1 to 2 times the pond volume per hour.
I'm sure that a turnover of 1/2 the volume per hour would be sufficient to keep things alive, but my experience has shown you'd likely have a harder time dealing with algae. Sluggish water circulation tends to encourage
algae growth which is the number one biggest complaint of pond owners.
Anyway, you have a nice looking pond there, and I appreciate all the pictures and video. I recognize the extras effort it takes to not only capture those moments while you are busy with the task at hand but then to edit and post them after the fact. Especially when it appears you basically did everything on your own.
Bravo