Zend certified PHP/Magento developer

How to block any type of video from loading/playing online (YouTube, Netflix, Vimeo etc) in all browsers

I am currently trying to beat my addiction to spending countless hours online watching YouTube videos etc. The issue I am currently facing is that I need YouTube for my daily work(Reading and replying to comments, researching channels, etc), but I get too distracted by all the videos on the sites. Is there any way to deactivate any type of video loading for all browsers?

Is there something similar to editing the host file in Windows?

The perfect solution would be something that does not involve chrome, firefox, opera, etc. extensions, as those are extremely easy to delete (Yes, I am quite addicted to these sites…)