Disney is currently testing full lighting of the Yeti on Expedition Everest, removing the strobe lighting. Guests were reportedly unhappy with the strobe effect because they couldn’t actually see the Yeti.
The Yeti still doesn’t move, but the lighting makes viewing the Yeti clear as day. Here’s a really rough video of the Yeti. I never had a reason to try to capture the Yeti on photo or video, so I was surprised at how difficult it really is.