The Public folder was a feature in Dropbox that was later removed. It now exists only for users who've signed up before it was disabled.
For newer accounts, you can share a link to any file from any directory by clicking Share Link. You can't, however, get a direct public link from the context menu itself.
See: What is the Public folder for? - Dropbox
youtube-upload now uses Youtube APIv3 and OAuth2, whereas GoogleCL is broken due to OAuth1 turndown.
https://github.com/vinitkumar/googlecl is a fork of GoogleCL, which claims to have been ported to OAuth2 (it is not available via PyPI though).
Use GoogleCL, the universal Google command line client. It's implemented in Python and ...
Dropbox links described by slhck give you everything you need to share and preview files and folders. However, if you want to use the old system of Public Folders, click below to enable one on your account.
Use this straightforward tutorial on accessing the standard Youtube Cloud API, takes 10 mins to setup and gets the job done:
Google happens to have its own upload_video.py script, and I could make it work with some, or rather a lot of, efforts mainly ...
Just email the photo to yourself (it can also serve as a backup of that picture). Or you can connect your iPhone to your computer via a USB cable.
Or download a photo sharing app. Or use Dropbox.
But if you want it quick, use apps that share photo via a web browser (using an IP address and port). You can download the free iOS app WiFi Photo Transfer. No ...
@Andrew, I would recommend Insync - it's a client-based sync tool that runs on many OSes, including many Linux distros. It will cost you a very reasonable $15 one time - there's no recurring fee. It meets all your other requirements, including backing up the delta of the entire contents of the drive.
Check out their page for Linux and their CLI reference ...
I don't use an iPad so I can't be sure, but if I haven't ticked the 'archive document in your kindle library' then the document doesn't get sent to the cloud.
So the only copy you need to delete is the one on your iPad.