The biostatistics course with downloadable lectures is just one of the several courses from OpenCourseWare at the Johns Hopkins Bloomberg School of Public Health (JHSPH).MicrobiologyBytes.com has useful short video tutorials about the main statistics methods.
References:
Introduction to Statistics. Free video webcasts from UC Berekely.
Link via The Patient's Doctor.
Image source: OpenClipart.org, public domain.
Further reading:
MIT OpenCourseWare features 1800 course syllabus, written notes, video and audio lectures all available online for free. Highlights for High School are also included.
NPR Audio: How To Make Sense Of Medical Statistics (28 minutes), 01/2009.
MedPage Guide to Biostatistics (PDF).
The one medical statistic that you really need to know: Number needed to treat - BMJ, 2011.
Tufts School of Medicine - OpenCourseWare
Med school course materials from University of Michigan http://goo.gl/t84PI
The UMass Boston OpenCourseWare - University of Massachusetts Boston http://goo.gl/DzeLB
UC Irvine, OpenCourseWare http://goo.gl/XH1Ed