Why do you want the "best" key? You want the software to work. The legitimate license unlocks:
A cracked key never does all of these reliably. itubego license key best
The best keys allow downloading entire playlists from YouTube Music as high-bitrate MP3s (320kbps). Cheaper plans often cap audio at 160kbps. Why do you want the "best" key
If "best" means reliable, fast, and secure, you only have two real options. A cracked key never does all of these reliably
For those deterred by the price tag but unwilling to risk malware, there are legitimate middle grounds: