You never told us what to do with the 4 bottom holes yet I can see poipes coming out on the right of the video. Can you explain so I can finish this build.
Lots have asked for the name of the store. Yours looks like it has lots of great plumbing parts as well. Rather than reply with "plastic store', please provide the actual store name and location and link if you can.
I have watched a few of these videos. None of them say what pump they use. I was digging out a stump and instead of filling the hole in my son wants to build a turtle pond for his pet Snapping turtle.
its depends on the size of your pond , you can ask the aquarium shop and tell about your pond size they will advise you . my self i use 65 W submersible water pump