Rust has definitely been an issue. The metal pipes rusted in plastic fittings almost immediately. Somehow they hold water, though I can't figure out how it gets in. The whole things leans in multiple directions... and now the cover is tearing. It's ready for the for the scrap heap.
This is what I currently have (and I did NOT get it at the price he did):
I haven't got time to watch the video, but from the preview the frame looks exactly like the one I had though the plastic cover was different. The water got into the plastic fittings on mine too, and they hid the rust for a while. I was lucky I noticed the problem before the whole thing collapsed. I never had a problem with mine leaning, maybe because it was in a more sheltered position.
I hope you manage to build something sturdier.