How to Watch 4K YouTube Videos on iPhone iPad
YouTube app only displayed video up to 1080p resolution on your iPhone iPad in the past decades. Now the case is different. Apple's iOS 14 and iPadOS 14 get updated in support for Google's VP9 codec, indicating that you can enjoy YouTube videos on iPhone iPad with resolution up to 4K 2160p. Of course, this is for YouTube app, 4K still unavailable with YouTube in Safari in iOS 14.
To watch YouTube 4K videos on iPhone iPad, you're required to update to iOS 14 or iPadOS 14 first. Beyond that, check your hardware device iPhone iPad whether they're compatible with YouTube higher-res 4K video or not. Right now, the compatible devices that have an OLED and HDR display include iPhone 11 Pro Max, iPhone 11 Pro, iPhone Xs Max and iPhone Xs. Though iPhone X sports with an OLED and HDR display, it doesn't seem to work with YouTube 4K 2160p yet. As for iPad models, the newer model like iPad Pro (2020) supports 4K YouTube playback. Test your iPad if your iPad is older model.
Play and Watch 4K/4K HDR Content on iPhone iPad
If you have one of the above-mentioned compatible iPhone iPad devices, do as follows to make 4K YouTube content playable on iPhone iPad.
Step 1: Update to iOS 14 or iPadOS 14 public beta on your iPhone iPad. Check the detailed guide if needed.
Step 2: Get YouTube app upgraded to the latest version.
Step 3: Fire up YouTube app, find out the video, play the video and tap the "More" icon at the top-right corner of the screen.
Step 4: Click "Quality" > opt for 2160p. Considering the highest resolution of iPhone model goes to 2688x1242 pixels, 1440p (2560x1440) is also a favorable bet.
Some of you may prefer watching YouTube 4K video on Apple TV. The procedure is much of muchness. Open here to know the nitty gritty if necessary.