Jailbroken iPod Touch (5th generation) erase all content & settings problems.
Unless your previous iOS was 8.1.3 you have no option but to update to 8.2. [&amp; that will change within a few days.]

Apple stops signing old iOS updates very soon after the release of a new one.

It will only still sign an older iOS if that is the latest one your device is capable of running.

If you are having difficulty downloading the ipsw file, you could use a different downloader &amp; use the links posted on OS X Daily - these are direct links to the Apple site.