I found these images related to the Porsche 904/8 Bergspyder another interesting link: https://www.motorsportmagazine.com/archive/search/longford
the Timmy Mayer hump (he talks about) is actually about where he's standing in the video, but it wasn't built up like a flood barrier back then (but still higher than it is in '67 - they shaved it down after Mayer's crash in '64). So the accident and trees he talks about are actually on the pub side of the hump, but the driver's left of the road. If you check in-sim you'll see the stone memorial to him by the fence on the left of the road. The stone is now on display in the pub.