Lambda sensor bad?

[ronenfe]

Looks like the donut is a little torn where the leak was. I am going to replace the donut. I also tighten the manifold nuts a little more and hope it will help, worst case I'm going to seal it from the outside. I hope there aren't any points in the gasket that leak and I can't see them because of other parts blocking the view.
There is no way I'm going to remove the manifold, there is no access to all the bolts without removing the head.
The gasket was part of the set of Ajusa gasket kit 52105000.
Here is the video of the leaks: https://www.youtube.com/watch?v=pIm8RMj3PnE