Although there are many of them...

https://www.speedrun.com/hcr2/runs/yw346e3m

These are all I found.

you forgot about balgarka runs

What runs?

I don't know that balgark has done some adventure freeplay speedrun

i finded in under one min a balgarka run with replay speedrun

https://www.speedrun.com/hcr2/runs/y9dj52vm

https://www.speedrun.com/hcr2/runs/z0og50ez

https://www.speedrun.com/hcr2/runs/yvxjepoz

The last link you gave is all right, but I understand the rest