Question

where can I see the lectures?

Answer 1

Here is the homepage of the course : http://ocw.mit.edu/courses/mathematics/18-01sc-single-variable-calculus-fall-2010/

Video lectures are available in each segment of the course : http://ocw.mit.edu/courses/mathematics/18-01sc-single-variable-calculus-fall-2010/1.-differentiation/part-a-definition-and-basic-rules/session-1-introduction-to-derivatives/

Alternatively you can find them in some other places on the web. For instance here : https://archive.org/details/MIT18_01SCF10

Answer 2

You can get full information and all kinds of materials from the homepage of the course.
But if you just want to get all the video materials for easy access, you can use the iTunes U to get the video