ClinicalKey has an impressive collection of image and video content. The Netters images are within this interface as well -and it may be easier to search than the Netter Reference Collection linked above. Search for your topic of interest, and then limit the Source Type to Multimedia.
If your interested in surgical procedures specifically, or mapping out the anatomy of a surgical procedure, you should also consider Procedure Videos - a collection of surgical procedure videos.
From the main landing page, you can also select Multimedial as an option to browse.
