The causality of Evil Eye is still not an established science, its effects however are well known to humans and is primarily based on human observation and experience. Affect of Evil Eye on photos/videos requires more study and this has nothing to do with religion.
Please refer to the videos in the following thread to understand the concept of Evil Eye and its basis:
Discussion 40729
ask.ghamidi.org
Remedy For Nazar - Ask Ghamidi
Are there some remedies for Nazar as suggested by Prophet. Any verse of Quran etc. I read in a Hadith that doing wuzu nullifies nazar. Kindly guide about