Various signs for "DOWNLOAD" are still emerging. Here's one I like. It looks sort of like the sign for "quote/title/phrase" but the position starts higher and sometimes a bit off to the side and then then moves downward to a location in front of your torso as the handshapes change to bent "V" hands.
You might see other versions of the sign for "download" such as one that
consists of a raised "D" hand being lowered and changed into an "L" hand.
That's fine but some people might consider it to be Signed English due to
the use of letter handshapes when an existing ASL sign could be used.
Download as in "streaming"
STREAMING
Streaming: https://youtu.be/3Dwnb85A_cE (on YouTube)