Problems with Videos

I've embeded a lot of anime videos onto my site and it seems everytime I try to move or delete one page, everything goes missing yet when I look at the site page, It says I've still used up more space then I should have if everything was deleted.
I don't really know how to use the file manager but if someone could restore the work I lost or tell me how to return it to my site, I'd be very greatful.
Also, I have not purchased any of the upgrades and so, I do not own the backup system.
I'm not sure if that information helps any, but if there is something you need to know that I have not said, please let me know and I will explain it the best I can.