Whenever you're visiting a website and watching videos on it, there will be times that you will be directed to the same video again. To avoid that, Markers made a way to mark all the videos you just watched as seen. 

The extension only works on these social platforms: Youtube, TED, Twitter, and Indie Hackers. This means that you can mark all the videos you watch on Youtube and TED, tweets you see on Twitter, and product pages you visit on Indie Hackers. 

Every item you mark will have a different appearance, so you can easily spot them when you revisit the website. And each marked link will automatically be synced and backed on your cloud. So, install it now!