Her video.The user Cruelsister here in this forum says Panda is not very good against zero day and ransomware...but his video wasn't fair, because the free version doesnt have the data shield.
The data shield is irrelevant. The test was against the free version their software (Panda's most popular product I might add) which includes behavioural analysis/blocking and it failed to block the ransomware before encryption took place. Don't think this is exclusive to Panda though; if you go through her video list you'll see pretty much every security solution she's tested has allowed malware to slip by and encrypt files or set itself up for persistence. That's just the way the cookie crumbles: Zero-day defences are far from perfect and malware authors continue to use more sophisticated methods to avoid detection by said zero-day defences.