I have memories of maybe 15-20 years ago as a young child watching a TV show that had something to do with soldiers/space marines fighting giant bugs. I recall it being CGI because I distinctly remember a scene of someone falling off a cliff and looking really stupid as they did so. It's possible that this person ended up not being dead after a while, but then they got visions about the bugs and what their goals/plans were.
The only other thing I can think of was that at some point in time, the main characters were walking around inside one of these big bugs (an especially big one) and it had organic mouthlike doors. Maybe they shot one at one point to make it open, but at this point I'm almost certain I'm getting this memory mixed up with something else.
I'd just like to know the name of this show so I can maybe watch it again, or at least put together these vague memories from my past. It's not something I've seen anything about for a long time, so I don't think it was very successful, and I don't have any names to go on.