The you are using (e.g., iPhone 5, iPad 4). If your device is currently jailbroken . Any specific errors you've seen so far.
Never download an IPA from a non-developer source unless you have the technical ability to decompile the app and check its source code.
Also, enterprise developer accounts are for companies, so if the IPA is distributed that way, it might violate Apple's policies. So advising users to be cautious if the IPA is from an unknown source.
Getting the official YouTube app to run on legacy devices like the iPad 4 or iPhone 5 (running iOS 10.3.4) requires bypassing the "unsupported" errors and outdated API blocks. While official support now officially requires iOS 16 or later, you can still revive the app using specific legacy IPA files and system tweaks.
Also, legal considerations: downloading official apps from unauthorized sources might violate Apple's terms. If the IPA is a cracked version, that's pirating, which is illegal. I should advise against that and direct users to the App Store. But if it's a legitimate IPA for a different purpose, then it's okay. Need to tread carefully here to avoid giving advice that could be seen as promoting piracy.