Why does the same post has different reach??

So I posted the same post all in the same hour. All hashtags are the same. The video content is the same 100%. The only difference is that the video 1, which is the most viewed had a popular song and got muted for copyright. Video 2 also had a copyrighted track, but it's not very popular, so it didn't get the reach, but still got muted. And the Video 3 had a copyright free track, not muted, not restricted, but still very bad reach. At the moment my page has 50 followers. Could the song be the thing that gave the reach, even though the video got restricted?