Somebody put their own name on it. They used your post to say something about themselves, to an audience you do not have. This is the only signal that recruits.
How often that happens on Instagram
Instagram is not connected yet. Add it and its own numbers show up here.
What it is not
Not agreement with all of it. People forward the one line, not the video.
The move
Find the line they were forwarding and make it the on-screen text. Then run it on a second account - sharing is the one thing that travels off your own list.
Find your best for shares