I only watched the first video.
He did a nice job sculpting the ground and the overall finished product looked good, except for the exposed liner near the cap stones.
I personally prefer more of a natural look, but some people do like a more contemporary style.
Wow! So many things to comment on.
That liner doesn't look like EPDM or HDRPE. It looks like PVC to me. It seems pretty thin.
Toward the end of the video the fountain is turned up pretty high. There's going to be some water loss there for sure.
It appears he introduced the fish too soon.
Way too many fish were introduced. No consideration for how large they will get or how their numbers will increase from reproduction.
I'm no expert, but why did he handle the fish when introducing them? Why stress them by grabbing them? Just slowly pour them in.
Yes, You Tube is great in many aspects, but you have to decide on your own what is good, bad, true or false.
Whenever I need guidance on a subject, I'll watch several videos before coming to a decision on what I'm actually going to do.
One of the problems society has is many people don't use their brain. They see it on the internet or on the news and take it as unquestionable truth.
It's almost like they are brain lazy.
People need to exercise their brains by taking in different views or opinions, then decide on their own what they feel is the best decision.
Then there's "common sense". I don't know why they call it that when is not all that common!