i do not understand

There are a few problems, here Deidra. 

If you change another to other, then you have to make the word form plural – other forms.   Since you are listing more than one thing (television and video games - no comma when listing two items), you do indeed need the plural reference to match. 

However, television and video games are not forms of behavior. Sometimes it is helpful to boil the sentence down to the basics to see what you are actually saying.  Your sentence states that “forms of behavior are TV and games."

I think you are trying to say that watching TV and playing video games are ways that kids (or maybe adults) learn how to behave.  Since you are using the word social, I wonder if you are tying this into social media somehow.  I don’t think that television is considered social media, but because of chat features and shared gaming experiences, video games could be.  Social media has an interactive aspect that television does not provide. 

The phrase “social learned behavior” is still a bit confusing.  If it doesn’t have to do with social media, I think it should be socially-learned behavior, with a hyphen.  Most human behavior is learned socially, by watching others.  We often just say learned behavior.

I may be changing the meaning, but here is a rewrite based on my best guess at that.

Other sources for learned behavior are television and video games.