contrary to Alex's ground breaking discovery, streaming is the upload/download of audio/video data over the interweb in real time. If Alex was to stick a cork in it, sit down in front of a computer & watch some bollox on youtube or something similar, all would become clear (once the stream has stopped buffering).
Alex: Hey, like, i've been streaming all day at school.
Teacher: I hope you weren't streaming DVDs, young Alex!
DMCA bigwig: I'm closing your school down for breach of copyright.