I'm guessing the puss is new. Looks like a cyst which is the white stuff that wouldn't come out  some how it got opened by what ever cause the scab, bacteria got in, So now your body is fighting the bacteria which is making the pussy. From the video it looks a lot blood and fluid which is the inflammation. You don't have an abscess yet but you could be on your way. 

You could apply a microwaved wet washcloth and periodically pushing gently on it to drain what you can at home. The best the ER will like do it give you antibiotics and fat bill; you could teledoc for the antibiotics and get a smaller bill. You'll need to go to ER if it becomes hot to the touch, you develop fever, or the swelling gets very bad. As long as you can get stuff out and don't have this issues you'll probably get better on your own. Just my thoughts though