I have to grade a master project on representations of symmetric groups (char $0$) third time in my life and finally I came to a conclusion that I have to get a grasp of the matter. I am aware of plenty of sources on the topic, such as Lecture 4 in Fulton Harris, but to my shame I don't find these sources user-friendly (far too many things left unproved). So here is a question:
Are you aware of some nice sources on representations of symmetric group (in char $0$) that are user friendly? Maybe some online videos?
This topic seems to be really beautiful, with huge amount of applications and connections to other bits of maths, so I believe there must be somewhere something pedagogical and user-friendly...