"I was on your Web site, and you have some pictures and videos of guys who are partying like ******* animals"
"I was on your Web site, and you have some pictures and videos of guys who were partying like ******* animals"??
They are both correct and have the same meaning.
The first focuses on the current action (what you are seeing now).
The second focuses on the past action (what the guys were doing when they were filmed).
1. So the both sentences describe what the guys were doing in the picture right??
2. Which one do you prefer??
Yes, both describe the same action.
I prefer the past tense version, because it is clear that the action took place in the past.
It is not uncommon, however, for people to use the present tense to refer to the action in photographs, videos, movies, etc. It is as if they are transporting the action from the past to the present because they are seeing it in the present. :wink: