This is the basic setup that researchers used to make the movies on this site. Image from DeVries, J.H., Thomas, C., White, J. (1996). Four-Dimensional Imaging: Computer Visualization of 3D Movements in Living Specimens. Science, 273, 603-607.
This was recorded over a period of two hours. Sulston, E. J., (2002). C. elegans: The cell lineage and beyond. Nobel Lecture, (Dec 8, 2002), retrieved 12/15/2003, from http://nobelprize.org/medicine/laureates/2002/sulston-lecture.pdf.