Excellent trip last night, here is the video (sorry it's 19 mins long but it does go quickly ). Done some selfie footage holding the GoPro and it adds a claustrophobic feel to some of the squeezes. Really makes you see how tight some of them are.

Enjoy

I have just found this video, and it really is excellent! I have not done PS and not sure I want to! But this vid certainly does give a very clear picture of the atmosphere of the place. The camera technique you used is amazing! Did you have the camera attached to your foot in some places?