On the Strange Paths blog is an excellent movie showing a depiction of molecular machinery at work in copying a DNA strand. This 1-minute video is a must see.

Even including imaginary "sounds" and color-coded molecules to give us a better idea of what is happening, this DNA replication movie was made using information from researchers at the Walter & Eliza Hall Institute. Much more videos at that site.

H/t to Nanodot for the link.