Helping people with computers... one answer at a time.
When we say "Java," it can be two completely different things. First, we have to decide which you are talking about.
Something's wrong with Internet Explorer in this case. There's certainly no easy way to replace it, but it can possibly be repaired.
Adobe Flash is a nearly ubiquitous tool for displaying video on the web. You must install if, of course, but often that's not enough.