u/Dear-Touch-1658

I adjusted myrear derailleur (Shimano Tiagra 10s) and it was fine. Fast forward couple of weeks and it started being noisy and it will shift on its own.

Is this play (check video) the reason am unable to properly index my gearing?

https://reddit.com/link/1t971e6/video/s3ej4bepbb0h1/player

Derailleur play