Could you describe the problem in words rather than with a video?
Many people are wary of downloading files from an unknown source.
The words you used there - "pretends to clean" - suggests a probable cause of what you may be seeing though.
If you have your safari history synced, or backed up to iCloud, then CCleaner will clear it from your machine (and report that it has), - but then safari/iCloud will sync it right back again.