If you're looking for an excellent tool to get some fun at the same time, you've found the right one: Concert.

What is it about?

In addition to enjoying a party, you can also play any Youtube video on many different computers. Now you can play all of the videos you want to at the same time.

How to Use it

To use the app, first add the Chrome extension and it's really easy.

Once you've done that, just type the hashtag of the party you want to invite in the youtube video url and press enter ↵

The hashtag ensures that you want to start a new concert. Invite your friends, and now enjoy the effect on multiple screens at once.