Multiple youtube livestreams on one screen?

Do you know a website where you can run multiple YT and Twitch livestreams at the same time?

That Multiple YT and Twitch livestreams should be able to run in parallel on one screen. A similar structure can be found on the multistre.am website, except that you can only run Twitch Streams there.

I would be very happy about answers:-)

Open several tabs and drag them onto your monitor

Open several tabs and then: Press the Windows key + arrow keys (direction as you want it to be) and the windows will be arranged for you, alternatively you can just pull everything yourself.