I agree about the unoriginality. However,

1. When I posted raw text, nobody read. In fact, a few read the text after the videos.
2. I wouldn't say everything highly valued here was never published elsewhere. Otherwise, Steemit needs its own videohosting.
3. I don't think I hurt the authors, rather promoted their content. I posted only samples from their channels. Quite the contrary, maybe even after this introduction more people ask them to join.
4. I don't care about getting paid a lot more. This is not my primary source of income.