There is an alternative choice, though, and it's known as Shou, from Shou.TV, that permits you to screen record directly from your iPad, iPhone, or iPod touch—without having to breakout or use a pc. This app isn't accessible within the iOS App Store, thus you will be sideloading it like we've done before within the past for computer game emulators like GBA4iOS and NDS4iOS.
Step 1: Install Emu4iOS Store:
Directly from your iOS device, head over to emu4ios.net and download and install the Emu4iOS Store (Beta). From the Emu4iOS Store, you'll be able to download apps that are not in the official iOS App Store, without having to jailbreak your device.
Once the app is done installing, open Emu4iOS and tap on Trust. Don't worry, nothing bad will happen to your device.
Step 2: Install Shou:
You'll find several apps available through Emu4iOS, but the one we want here is Shou, the screen recording app you need to download—tap on it, then select Install.
A popup will appear asking you to confirm installation—select Install to finish the process.
Step 3: Screen Record, Play, & Save:
In order to use Shou, you'll need to sign up for an account using your email, Facebook, or Google+ credentials. To start a screen recording, tap on Start Recording—you'll see a red Shou banner at the top of your screen indicating that recording is currently active.
Note that in order to record full-screen games and videos, you'll need to enable Assistive Touch by going to Settings -> General -> Accessibility, then toggling Assistive Touch on.
To end the recording, either tap on the red banner, or go back to Shou and select Stop Recording. Slide over to the Recording tab to view the recording you've created, play them within the app, play them with another app, save them to your Camera Roll, or delete them altogether.
Tap on Open In... to open the video in another application (Vine, iFile, etc.) or to share it via AirDrop or email. When you save a video, you'll be able to view it from your Camera Roll.
Below you can see what the playback looks like for a full-screen game and video from my Camera Roll, with the Assistive Touch toggle towards the bottom-right of the screen (since that's the only way to properly record games and videos).
As for issues, the only time I encountered lag was when recording high-definition videos on YouTube, but then again, why would you want to record a YouTube video anyways?
Other than that, Shou is very straightforward, simple, and works extremely well for showing off some tips and tricks in apps and games—.