How do you say 直播 In English? As eveyone knows that 直播 is Live.
But in this sentence:
What are you doing tonight?
看直播.(Watch Live)

I think it's a little strange. 

PS:I watch online live, such as douyu.
Most often, we use the term "stream" -- as in "I am going to watch Sccc's stream playing Dota 2 online" -> "我要看Sccc在网上的Dota 2 直播"

Broadcast is a more formal term used when the contents are broadcast onto a television or radio.