Data usage and streaming video. How does it work?

[rotobadger]

Ok, hopefully not a completely stupid question but can someone tell me this: If, for example, I watch a movie that is being streamed to my phone via LTE, and the file size of the actual movie is 1gb, will I have used 1gb of data if I watch the whole movie? Or does it work differently than that?

Thanks in advance!

 

[boomhower]

It may vary a little bit but it should be very close.