Alphanumeric symbols in the data/app directory?

Why are the names of the applications replaced with alphanumeric characters in the data/app directory? I am seeing this when accessing the directory through an adb shell.

delete – Device or resource busy when deleting Youtube folder from /data/app

I am trying to delete my /data/app/com.google.android.youtube-DVUYe6iX9r5J1nYk8PlC2w== folder to fix the bug described here; however, I keep getting a “Device or resource busy” message. I tried using this command

adb pull /data/adb/service.d/vanced.sh > %UserProfile%Desktopvanced.sh

and also Total Commander file manager but received the same error. How can I delete the folder?