I've developed a 'Help' system which basically shows (YouTube) videos in a web viewer. I was feeling really pleased with it, but I've now been told that some users, who use a remote desktop, cannot use it 'because they don't have Internet Explorer'. Is the web viewer dependent on a specific browser? I thought it was self-contained, but I've obviously misunderstood something.
Can anyone explain (or guess?) what the problem might be?