Now, this is the perfect example of when you may have
to do testing and validation.
You start looking at Viber images and Viber videos.
Why is that one different?
So look at this.
These ones down here look like they're images with a Unix
Epoch date/time stamp.
Why is this one different?
Why is the date format different?
What is that long strand of characters?
What does this mean?
Is it because the user took a photo within Viber
and it was named differently?
Is it because they attached something
maybe from their photo gallery?
Is it a received image that was saved?
Test it.
Validate it, so you understand these differences.