Hi there,
There are different types of apps are available in the APP STORE regarding the data recovery in ipad.
But the best one which I recommend you to use is "iPAD DATA RECOVERY".
This app allows you to recover all the deleted files from your ipad.
The app is available in the APP STORE and you can download it from there,
Here is the procedure to use it
PROCEDURE:
1)Launch the DATA RECOVERY app.
2)Tap on FRESH RECOVERY option,
3)Now tap on the type of data you want to recover like photos, videos etc..
4)Then select any option from the two given below:
a) Deleted File Recovery
b)Formatted File Recovery
5)Then, select DRIVE VOLUME for Data Restore/Recovery
and its done..
Now the app will look out for the deleted files
Regards!!