if youre doing homework, i recommend writing out truth tables for the statements and comparing, gives you a bit more insight into the statement truth conditions
Are you downloading to an sd card? If so, that's the issue, steam downloads to ram and then has to wait for the sd card to write the already downloaded data.
My next idea would be to try connecting to the internet using a usb c ethernet adapter of some kind. Is this only the steam deck, or are other steam clients on the same network affected too?
I used to run a script that recorded the stream while it was live using Streamlink and then i had the vod locally saved. Wont get you access to vods of past streams but the simplest solution for fresh streams.
Debian