YouTube has ventured far beyond its original remit of short homemade videos clips, and nowadays you're just as likely to find professionally produced content that runs to half an hour or more in length. If you want to sit back and relax then you need some sort of YouTube remote control.
It all works via a relatively old YouTube technology designed for connecting up smart TVs on the same Wi-Fi network as your phone, though it works for laptops and desktops too. It's since been superseded by the Chromecasting technology, but it still works fine — with no HDMI dongle required.
Configuring YouTube TV
Here's how it's done: Go to the YouTube TV portal at www.youtube.com/tv to use the interface that's specially designed for sofa watching. Click Settings from the pop-out menu on the left, then select Pair Device. You'll be given a code which is the key to getting your Android device connected up.
From the YouTube app menu on your phone or tablet, choose Settings and then Connected TVs. Tap on Add TV and enter the code we brought up earlier. You can now control playback on the big screen, add new videos to the queue, and browse around for new content while you watch.
If you have a Chromecast attached to your Android device, this newly connected TV takes its place, so you can link up to it again via the Chromecast button (you can always add the Chromecast back again when you need to). Enjoy controlling YouTube from your couch!