The particle physics community is always improving its use of the Internet for sharing information and now that goes well beyond preprints of journal articles! There is a wealth of video out there ranging from seminars and lectures to whole series from summer schools.
If you're interested in getting a little deeper into some physics this summer but can't make it to one of the summer schools, look through flip's list and see if one of those takes your fancy. Most summer schools have a theme each year but they generally manage to tie in a wide range of physics so the content usually covers a broad range.
Most of the institutions archive their previous summer schools so keep them in mind if you want to learn more about a particular topic that was the subject of a summer school.