> Why can I buy music without DRM but video hasn't followed that path?

The movie industry has always been more paranoid about piracy, compared to the music folks. And that's actually quite reasonable for newly-released content - the stuff that gets shown in theaters or on premium streaming services, and that pirates compete to "rip" ASAP. But there's no sensible reason why their long tail content couldn't be made available in DRM-free form, long after it has stopped being "current" and heavily sought-after. It's only market concentration and lack of competition that keeps this from happening-- and this is why DRM is evil and must be shut down. It's the opposite of a free market.

I think the tools still exist. Probably not for 4K, but up to 1080p should be doable. However, unless you find something really rare on itunes that you can't get elsewhere, it's quite pointless.

Because of their relative file sizes, downloading audio became fast and easy to do much sooner than video. It created a problem for the music industry pretty abruptly. They didn't have streaming technology (and business structure) ready to go at the time to counter Napster et al. So they went with downloads.

By the time it became easier to pirate video, streaming was further along and the video industry went straight there because it's more friendly to them than the download option.

File sizes, basically. The marginal benefits of streaming music over downloading it are small. Consumers are willing to pay for streamed video over downloads.

No idea, its not as if DRM works. At the end of the day the movie has to be shown on a screen and pirates can just capture that easy peasy.

Applications and browsers have taken steps to prevent this. For example, you typically can't screen-capture a Netflix movie on Win10 unless it's running on a windowed virtual machine.

Well there you go; easy peasy. But actually, I just checked how long it took season 2 of The Punisher to appear on a particular torrent site; it was all up in 720p and 1080p in less than 10 minutes. There are better re-releases later[1], but that seems to imply that the pirates are just downloading it straight, no screengrab hacks needed.

[1] E.g. Marvels.The.Punisher.S02.1080p.NF.WEBRip.x265.10bit.HDR.DDP5.1.Atmos-DEFLATE[rartv] (30GB) (1 hour 38 minutes after release time)

WEBRip should mean that it's being screencapped somewhere. WEBDL means it's a direct download. But with that time to release, I have no idea how they're getting and uploading the content that quickly.