It’s been confirmed: My website has traveled back in time for about a month’s period, as my web-hosting company has restored February 19’s backup for my account. As a result, I have lost the articles and videos that I uploaded during the last three weeks.
I didn’t have any backup of the data for myself, so the lost posts (e.g. the one about KVM virtualization) are simply gone now. I can’t write them again, but let’s hope that I’ll be able to compensate for them with even better stuff.