Today we will learn how to watch YouTube on pc/laptop using cast option from your Android or iOS device. How do I go about this tutorial you might wonder? I have a laptop from 2006 and we use it while using AC in another room which doesn't have TV. You need to install custom userAgent string extension https://chromewebstore.google.com/detail/custom-useragent-string/lejiafennghcpgmbpiodgofeklkpahoe?hl=en-US&utm_source=ext_sidebar You will be able to change the youtube version to that of youtube TV. Enter the desired url: youtube.com/tv In custom userAgent it will be by default written something else like different version, copy paste this code in that box. enter a custom userAgent string: Mozilla/5.0 (Linux; Tizen 2.3 ) AppleWebKit/538.1 (KHTML, like Gecko) Version/2.3 TV Safari/538.1 Click on the plus button to add the selection, sometimes YouTube.com/tv won't be added so you can also add again. Open YouTube.com/tv on your browser and then it will tell your to activate you