iTunes Connect is software for developers, so I've no idea why you're seeing a message about it.
iTunes is horrid software anyway. (The technical press frequently slate it). Use third party app, as suggested by Z-M. Apowersoft Phone Manager is well-reviewed but pricey. However you get a free trial period with it, so it should be good enough for your needs at present:
https://www.apowersoft.com/transfer-movies-to-ipad-without-itunes.html
(Fairly obviously, you'll need to use 'Export', rather than 'Import' which is shown in the example on that website).