If I use your site, "medium" does not matter. All I care about is MY experience, and therefore you need to either adapt the site, the design for a fairly low speed (iPhone 2G will deliver you 70-80 kbps, if you're lucky, take one general case), or be very clear about the requirements so that I can decide whether my connection will work or not.
What you don't want to expose your users to is unpredictably intermittent, intermittent video and audio.
source
share