Before we provide a bounce rate (good discussions above about visits vs. entries, BTW), we need to agree on the definition of a bounce.
If someone lands on your site, does nothing, and leaves, that's clearly a bounce.
If someone lands on your site, then watches a video, or clicks an exit or download link, but does NOT view another page, is that a bounce?
I have a fairly strong opinion, but before I taint you with it, I want to hear whether video watching or link clicking disqualifies a visit from counting as a bounce.