http://www.france5.fr/2gm/W00399/6/110860.cfm
This link, of a schoolar book equivalent, present the WWII under a very wide view. A timeline present the very major events of WWII. Major events have a link to a subpage containing articles and some videos. Cool to have a look at this.
Thanks to l'Heretik.
PS : this is a page from France television. So, quite all ressources are in french, but you can find a video, in russian, about operation Bagration for example.