I'm assuming you're referring to a software or tool called "Zal" that has a "Pro" version, and you're looking for information about a potentially "nulled" or cracked version that claims to offer "extra quality".
Extra quality in video sharing comes from: zal pro nulled extra quality
Suddenly, the $99 official license seems like the bargain of the century. I'm assuming you're referring to a software or
index.php and config.php: Look for base64 encoded strings. If you see eval(base64_decode(...)), your server is compromised.curl -s https://isithacked.com/check/[YOUR_DOMAIN] to see if Google has blacklisted you yet.Conclusion