Watching videos on the web while the web shield of avast antivirus is switched on causes the RAM usage to go up steadily. When I investigated using Poolmonx, I found that a file called ndis.sys is increasing in ram usage every time I watch videos on the internet. The pooltag is NDnd. Turning off web shield stops the problem. It is same as the problem discussed in the following thread.
https://forum.avast.com/index.php?topic=221645.0
I have recently installed avast and have the latest version so its not a problem of that. Please resolve this issue.
I should add that I am experiencing this problem for microsoft edge also unlike what is mentioned in the other thread.