That's suspicious - is Microsoft unable to notice it or they just want the upgrade to Windows 10 and pretend that they don't notice it? I bet for the second. In general I agree with Microsoft's reaction against piracy but it seems that "telemetry" counts more for them now.
Free Download Manager can download videos from many sites (you must activate the "Download it" button in the options), perhaps it can download this video too.
From Windows 8 (I don't have Windows 10, there must be some differences): Open Mail program> Make the Charms appear and click the "Settings" one> Click on Accounts> Click on an account. In this way a menu of choices opens which on the bottom has the option "Delete all accounts". If you manage to find the accounts on Windows 10 and click on one of them there may be a similar option.
I have the program and I think that you are wrong. You can restore to a different partition (of the appropriate size of course) or a different disc. If you want to restore via CD/USB use the Windows PE ones, the Linux ones have really rather limited capabilities.
Of course there is always the option to have two user accounts, an administrator one to do the relevant stuff (installing programs etc.) and a restricted one for internet access. A good AV program doesn't hurt either.
Personally I still install all the offered updates for Windows 8 x64, I won't go insane for the sake of Microsoft, yet I stay away from Windows 10. It seems to be the larger virus of the "Trojan horse" type...
You may want to check the Macrium Reflect Free v6 with the ability of making differential (not yet incremental but it is something too) backups and all the other features mentioned.
In fact the recovery partition contains a single .wim file which is divided to .swm files on the USB stick because it has a FAT32 file system (the 4 GB limit). I too investigated the possibility of transferring the recovery partition to a USB stick and I have three things to say: 1. The recovery partition is supposed to be used by an OEM recovery program (e.g. Lenovo One Key Recovery). 2. The OEM program may in fact not be able to use the recovery partition from the USB stick due to inherent limitations (the mentioned one is an example of this). 3. Even if you can't use the OEM recovery program (for whatever reason) you can use dism to do the job as cdob wrote.