Yep, you can initialize this on a vanilla image block as well, if you need to.

Here are all the options available with the scCaptions plugin:

• captionOnSlide (true): Only a valid option with Flexslider or single image. By default the plugin tries to create a caption for each individual image wrapper; if this is set to false, it uses .blockImg instead, creating a single caption div that can be updated when the slide changes.
• clickableCaptions (true): If the image is linked, append the caption to the link, but if false, use the next container up. This doesn't apply to the thumbs in a one-up or modal gallery, they should always be clickable to render the selected image in the large view.
• captionLargeView (true): Only valid with grid or row gallery; add captions to the large view.
• captionLargeViewOnly (false): Only valid with grid or row gallery; add captions to the large view but not the thumbnails.
• useBlockText (false): Only valid with Flexslider; if true, puts the image metadata in standard a blockText container instead of a custom container.
• changeEvent (before): Only valid with Flexslider and when captionOnSlide is set to false; 'after' is the other valid event.