It's quite likely the app providers (YouTube and Prime in this case) no longer support running on older hardware. Not Apple's fault. The latest apps are not capable of running on old hardware because the old hardware simply does not have the specifications now required. Which in essence means it doesn't work.
Things in the technology world are generally backwards compatible.... to a point ....... then obsolescence comes into play.
You didn't say how old the hardware actually is...?
Very true, MS and everybody else is and has been trying to get backwards compatibility killed off for years. Life cycle on Tech is 3-5 years max anymore.
