I didn’t respond to your post right away because I didn’t know whether I could comment constructively about your improvisation. However, since you would like some feedback and no one else has jumped in, here are a few thoughts.
My musical training has focused on works that demand the attention of their audience, as opposed to less obtrusive ambient music. In fact, most ambient music leaves me cold — I just feel there isn’t enough there to hold my interest.
While it would be unfair to criticize your work for failing to do what you never intended it to do, I do think that you could make it more interesting to a larger audience if you infused it with more unity and structure. I think, for example, of Eric Satie’s Furniture Music, Brian Eno’s Ambient albums, some of Vangelis’s more minimal soundtrack works — all ambient but still clearly exhibiting focus, repetition, structure, and theme.
On your YouTube post you mention that you love classical organ music. There are many resources that would help you explore improvisation in that tradition if you are so inclined, but that goes beyond what you have requested here.