Until I post a new video, this text will provide any updates to the strategy in my video.

First, on PC, the land cruiser is faster. So fast, that sub 1:00 is easy to achieve.

Second, cutting a hard right immediately after acquiring the rifle will allow you to enter the hadrosaur exhibit faster. I've tested this route and it saves 1-2 seconds if you use the rest of the movement I exhibited and have good rng. Personally, I feel inept as to not noticing this sooner, but that means there's room for improvement!