Less is more
Upload the same video to multiple YouTube channels?
Seventeen separate channels with the same content. I have placed the videos together in a playlist, to better illustrate them alongside one another.
That is a bad idea.
This practice works directly against the YouTube algorithm.
Instead of views being focused on one video version, views are split across many versions.
Each video has fewer views. Is subsequently regarded by the algorithm as less interesting and therefore suggested less by YouTube.