If you purchased this iPad in 2011, this is probably an iPad 2 (2nd generation).
What iOS is this running?
Go into the Settings App, under General, About an it should tell you what iOS version that iPad is running.
This iPad is 8 years old, now and both hardware AND iOS have gotten more advanced over a this period of time.
Also, your iPad is only a very low storage, 16 GBs storage model with a practical free data storage space amount of 9-10 GBs of usable data space.
For everything you wish to do on an iPad, this is really an insufficient amount of space on your current iPad.
This is why Apple, finally, in a secret admission, did away with 16 GBs iDevices about 2-3 years, ago.
I mentioned the differences in an iMac/Mac OS vs an iPad/iOS to educate yourself on the differences.
If you already own an iPad, then you should already be familiar with the differences on an iPad VS an iMac, no?
Since your iPad is so old and is no longer being supported with new iOS upgrades/updates AND has very low storage space, it may be time for you to purchase a new 2017 iPad model.
The new 2017 iPad 5th generation models have more features and are much faster, by a LOT, than your iPad 2 and come in a minimum base storage model of 32 GBs now (practical storage of 27-28 GBs) which is 2-1/2 to 3 times the storage space of an older 16 GBs iDevice model.
BUT based on your needs, I think that perhaps even 27-28 GBs of space will not be enough free storage space for your needs
Movies and TV shows need to be/must be fully downloaded to the device to be able to play fully on a device (without using WiFi to stream the movie or TV show ) and movies/TV show episodes take up a LOT of storage space on an iDevicd AND with other apps on it, as well as, books, music and photos, you may only have room 2-3 full movies OR TV show episodss. OR any combination 2 movies OR 2 TV show episodes to put on an iPad.
If you want a lot room for more full movies, TV episodes, eBooks, photos,etc., if your budget allows, you can get the new 2017 iPad 5 in a 128 GBs data storage model (118 GBs of actual data storage ) that would afford you more room for movies, TV show episodes, eBooks, photos, music and other third party apps you may wish to install and use.
Good Luck to You!