I love this kind of video. Sad but entertaining, and very mysterious.
I think that the "lost thing" is a symbol of wasted items that we throw away very often.
The lost thing the man (or a boy) found is hard to identify what it is, but the other ones looked like a TV, a pencil, an aircraft, and so on that are used in our daily life.
When we throw away something that we used to use, the "item" suddenly becomes a "waste". "Garbage".
The item, now a garbage, gets thrown out, never to be used as an item again.
Once something becomes a waste, no body actually pays attention to it any more.
It could be recycled if thrown away properly, but if the item was just left on the side of a road, in a bush, or maybe at the beach like the "lost thing" in the video, no one will recognize it as an item.
For example, if a broken chair was left outside, will you expect it to be useful? Probably not.
Most of the people would probably see it as a garbage, and never try to make use of it.
About the place the "lost thing" went in the end, I think it represents some kind of our feelings.
When we throw something out, we don't make any use of it, but still, we don't expect it to be left outside.
For some reason, every person expects a garbage to be sent somewhere, so it could be buried, burnt, recycled, and so on.
The place the "lost thing" went is probably SOMEWHERE we expect the wasted items to end up in.
We don't know where the items go, but somehow we think the item goes to a place for it.
