Screenshot was stolen. Not his system.

So? No customer data got leaked. And even if the vaults would get leaked (which they didn’t), they are 2FA encrypted.

@mooglestilzkin has already posted the url for Christian Lempa‘s YT channel. CL has just started a series „made for you“ about Docker: https://youtu.be/Nm1tfmZDqo8?si=g_L8bmm9qcFx9wve

That is the reason why I don’t self host my password manager: my 2FA passwords are in there, very conveniently and independently of any other device. I trust 1Password with that.

Dude, first of all: get your units straight. You throw stuff around which doesn’t exist (like „m/s“ or „M/s“, meters per second?), so without making sure that YOU know what unit you really mean, WE cannot know what unit you really mean. To be able to analyze a problem means that the problem itself is described precisely.

8 Mbits/s = 1 Mbyte/s . So make clear what you mean.

Also: what should we do with your imprecise description on what you have done?

I am using it hosted (Hetzner) and like it very much. Stable, fast, always available.

Nextcloud with NC Talk and OnlyOffice Plugin.

This is obviously not possible, as it is a huge undertaking to do that for the whole world. There is "Street View" in Apple Maps as well, btw.

And even if it were possible to "self host" Google Street View, its image dataset is estimated at 115 PB. So you you kinda would need to have a little bit of space on your homeserver.

That is not at all how this works!

songs which should be available for everyone

No commecial song is available "for everyone", every song has royalties that need to be paid for it to be legal streaming.

automatically download them from spotify, deezer, yt

None of these services support downloads, except in their own app, but then encrypted, so that no other app can use it.

There are some "Playlist curators" see https://routenote.com/blog/best-third-party-spotify-playlist-curators/ for some. But only if you have an account with the service.

If you want to self host such a platform, how should it inform you about new releases? If you haven’t downloaded everything on your server manually beforehand, where should it take the media file from?

Just use the streaming service of your choice. Self hosting music is over.

You seem to look for „digital signage“. So rather Google for that, imho. We use https://www.xibosignage.com to show some stuff, you are relatively free to put what you want where you want and can do that centrally for one or a lot of displays.

You won’t find one, because these solutions need to interact with the networking hardware. I would indeed suggest UniFi as well, because they have great, affordable, controller managed access points and switches. Normally, that only is a feature of multiple times as expensive enterprise gear.