Hi, if data travels over the internet as binary code then why it takes a long time to download a movie?

[DunbarPappy®ϟϟ]

Blend with the above concepts:
Large files (broken into "packets" and sent over TCP/iP) must go thru many 'steps' ("handshakes") before arriving at the destination iP.
Dropped packets must be resent; packets may arrive 'out-of-sequence' causing delay in final rendering; routing over the 'Net can get slowed down at any given node; your iSP may be "throttling down" certain file ports (P-2-P); and many other things.
It's a wonder it even works as well as it does sometimes.

See this summation of how the TCP/IP works: https://www.grc.com/sn/sn-380.htm
Use wordfind (ctrl + F) with this phrase to skip the non-relevant text: " So, DTLS " and dive right in. A bit tech heavy so get your mind right before commencing.