Welcome to the forums Maltyke, I recommend having a good read as you have mentioned because there is allot of good information on the forum.
I can tell you the the Nexus 7 is nothing like an iPad, it's far more customizable and you can put your own movies/media on the Nexus 7 by connecting to a PC via MTP.
You mentioned an OTG cable, do you plan on just importing from a thumb drive or exporting too because if you just want to import you can find an application on Google Play called Nexus media importer but if you want to export you will have to root your Nexus 7 to run an application called Stickmount.
Anyway, as I said have a read...
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