Hidden room in Skyrim dragur barrow

In today's video I'm showing you guys a hidden room I don't think anyone knows about, plus a spider area that looks like it leads to a potential area but I'm not sure how to get to it.

(sorry about the watermark to guys this software is pricey so it's just on there with the watermark)

https://vod.run/p/59076390 https://mercury.streamelements.com/imphoenixgaming/tip