The lost knowledge.
https://blossom.primal.net/f7641f77d7bf11a0a8b93be803ae9b7567886ca6ad2ad7c65fa6725ba8830df8.mp4
When I watched your video I was reminded of this video below. The mulch really helps capture waterfall and keep it.
https://m.youtube.com/watch?v=6rPPUmStKQ4&pp=ygUKQmFja3RvZWRlbg%3D%3D
https://m.youtube.com/watch?v=6rPPUmStKQ4&pp=ygUKQmFja3RvZWRlbg%3D%3D