How to download movies from Itunes?

I never did it before. I want to download Avengers Endgame (screenshot), there writing of pre-order on 30 July. Does it mean it will be accessed only in 30 July? Is that virtual version? I mean at 30 Jul I'll download a video file on my laptop for $ 20 or it will be DVD ordered to my address?

Added (1). If I asked something stupid don't blame me, I just wonder

Added (2). And yeah I forgot to add a screenshot… There's frim Avengers Endgame on Itunes page - How to download movies from Itunes https://itunes.apple.com/...mpt=uo%3D4

Thinking about getting iPod for my 12 YO daughter. Is it any good?

She's pestering me to buy her a phone on her birthday next month but I don't think she's ready for a cellular phone hence I'm thinking about buying her an iPod 2019, to at least get her started.

The iPod is relatively much cheaper than iPhones ($200 for the base model) and comes with Wi-Fi and iMessage which I think would be enough for her. Plus, I won't have to pay for another line as well which is always a plus.

Anyhow, my wife thinks that we should just buy her a proper iPhone without a SIM Card which she will use as an iPod until she gets a bit mature (~14 YO) but I know for a fact that she'll start forcing us to get her a line with cellular data the moment she'd get her hands on the iPhone hence I'm not entirely sold on the idea. Besides, the iPhone will be two year old by then and she is very careless about her possessions so it'll probably be half broken by that time, if not lost (Or stolen).

So what do you think? Do you have other suggestions? My family exclusively use iMessage and Facetime for communication so no Samsung phones and/or feature phones for me, thanks.