[pixelperfect]

Here are some excellent YouTube playlists for the subjects you mentioned. I have used and can vouch for the high quality of all of them:

Linear Algebra: https://www.youtube.com/playlist?list=PLlXfTHzgMRUKXD88IdzS1...

Probability: https://www.youtube.com/watch?v=KbB0FjPg0mw&list=PL2SOU6wwxB...

Calculus: https://www.youtube.com/user/professorleonard57/playlists

Be sure to work through problems and not just watch lectures, because otherwise you'll forget the content. For example, the linear algebra course has a companion site with problems, and the professor of the probability course wrote an excellent book with problems.