I've been doing exactly this and for even longer than this guy.
Then again almost 3 decades in the Tech industry (which amongst other things means seeing several comes and goes of "providers") have long taught me to be suspicious of being dependent on 3r party providers, and even more so of having my stuff hostage to their wills (either hosted in their machines or wrapped in encrypted envelopes which I cannot remove).
There is no actual good consumer reason for a seller of digital goods to keep it in their systems or in your own storage but encrypted, without letting the buyer have free access to what they bought.
Back when those things started a lot of people went for the convenience of encrypted Apple music on their iPods, encrypted books on their Kindles and buying videos that they could only stream never get and, inevitably, they got screwed and here we are.
I, for one, didn't got screwed with that stuff.
I've been a "digital packrat" for ages and in my experience storing things like video files in external hard-disks has been the superior option since around the time of Bluray and Xvid encoding (so, from around the mid 00s).
Further, whilst most of my collection from back in the days of recordable DVDs is stuck in them until I have the patience to transfer them (which would be many days worth of work), upgrading the harddisk storage over time as you need more storage is a breeze.
Also thanks to me using HDDs for media storage I've had easy access to my media collection from the comfort of my living room for almost 2 decades, since I put those disks on a homemade NAS (which for a while was an old Asus EEE PC with Linux) and had a TV Media Player on my living room connected to my TV and to the network so I could just use a remote to access the files via SMB and play them on the TV. (This was well before Android TV, and back then the Media Players were dedicated hardware solutions such as the ASUS O!Play)