Here's a link to the video I use for my classes on this topic. This is for the RH134 class, chapter 9 (which my college calls CIS238RH).
autofs, with direct, indirect, and indirect "wildcard" (my term) mounts, begins at 37:48
[Please be kind... I had pneumonia when I recorded the video, so there times when I make some noises, like snuffling and coughing. Also, my videos are unedited; I leave my mistakes in them so students can see that (1) no one is perfect and (2) how to recover from a mistake.]