I have found the following sites to be excellent as information sources.

This HSE site has excellent information in video format on a huge number of safety topics: http://www.hse.gov.uk/resources/videos.htm

The following site from the US Chemical Safety Board has a huge selection of Chemical Safety Related Videos. Excellent Site: http://www.chemsafety.gov

The following site gives free pictures for use in the preparation of Safety Training Courses: http://elcosh.org/images/

The following site is excellent for Tool Box Talk information: http://safetytoolboxtalks.com/

I constantly update the best site list. Visit whenever you want to see the most recent best site list.