Here is a summer school on Berkovich spaces http://www.diffusion.ens.fr/index.php?res=cycles&idcycle=490 (there are more courses at http://www.diffusion.ens.fr/ but unfortunately they are not broken into catergories; one has to fish for mathematical courses more or less via manual search) The following links lead to lectures in Russian. http://bogomolov-lab.ru/SHKOLA/courses.html a summer school for undergraduates (topics include number theory, metric geometry, anabelian geometry) http://www.mathnet.ru/php/presentation.phtml?&option_lang=eng has a huge collection of videos, including recordings of summer school courses both for undergraduates and graduates. http://www.lektorium.tv/ is an example of a similar effort.