Vacuum Leak Brake Booster/Under Driver's Side of the Intake Mainfold

[Cotton]

I have a vacuum leak that I believe is coming from under the driver's side under the intake manifold or possibly the brake booster.

Been trying to mess with this for a while as I have had it idle odd approaching a stop or at a stop for a while. Found out I had my intake mangled at the throttle body from putting it back on wrong when cleaning it. Finally got that back on where I don't think there is a vacuum leak coming from that but the leak still exists.

A few months ago I had thought I had an oil leak. Couldn't find the source but a few days later noticed my brake fluid was low. It was extremely dirty so I slowly replaced it out of the master cylinder. It's possible I mistook dirty brake fluid for oil.

I can hear a leak, but it idles fine resting. If I push or pump the brakes though it begins to have an erractic idle. I am fairly certain that the leak is related. What that goes under that area could be the cause of this?

Here are some videos of the leak:

https://www.facebook.com/tom.cotton....5798321780367/

When I hit the brakes:

https://www.facebook.com/tom.cotton....5826911777508/

Another video of the leak:

https://www.facebook.com/tom.cotton....5830138443852/

Any help would be appreciated. Thanks.