Had to go look up that book. It's actually available free from MIT: http://mitpress.mit.edu/sicp/full-text/book/book.html

The videos of the lectures but the book authors (Gerald Sussman and Hal Abelson) are also available for free.

Pick the MPEG1 versions. They are much heavier than the MPEG4 versions, but the text on the projected computer screen is at readable. IIRC, the MPEG4 are re-encoded versions of the MPEG1, which themselves were ripped from VHS.

http://archive.org/details/mit_ocw_sicp