Issue about you tube update

If your iPad is currently running, or cannot be updated beyond iOS 10.3.3/4, then have an iPad4.

Update support for iPad4 ended September 2017. The final iOS releases for this model were iOS 10.3.3 (WiFi Only models) and iOS 10.3.4 (WiFi & Cellular). iPad4 cannot be updated to any later major version of iOS as it lacks the minimum hardware requirements needed to run more recent versions. The 32-bit platform upon which the iPad4 is based is obsolete.

Most App Developers have dropped support for 32-bit devices and iOS versions preceding iOS11/12/13 - and have withdrawn older versions of their Apps from the Apple App Store. Withdrawal of Apps supporting older models of iPad is making their utility and usefulness significantly more limited. Once compatible versions Apps are withdrawn, you’ll not be able (re)download or (re)install them.

If Apps that you need to use now have higher minimum iOS-version requirements (such as YouTube - now requires iOS12 or higher) your only option is to replace your iPad with newer model. Of current models, even the entry-level iPad9 supports current iPadOS 15 - and has hardware specifications and capabilities that vastly outperform your old iPad4.

I hope this information is helpful - if only in clearly stating the fundamental limitations of your iPad4 and your available options.

Same issue started happening on my Ipad4 a couple of weeks ago. An annoying work around that I've been doing is uninstalling and re-installing the YouTube app. Seems to work for a day or so before I need to uninstall and reinstall again.

Also, I really love the advice of "replace your iPad with newer model"..... I think when this workaround stops working or gets too annoying, I might take that advice and replace my iPad with a newer model Samsung...

There's no way to update your iPad (most likely an iPad 4th generation) past iOS 10.3.3, because of hardware (specifically CPU/RAM) incompatibility, sorry.

Regards

Giulio