Jordan recently commented on an old post about cover letters:
Is it presumptuous to include a demo reel link in a resume if it is relevant?
“If it is relevant,” I don’t imagine it would be presumptuous, but I can’t imagine a circumstance when it would be, at least for a production assistant. (Maybe you appeared in “Within a Minute“?)
If you have experience as a Set P.A. doing lockups, you don’t need to explain how you “interacted with the public to facilitate the proper environment for the filming of crucial scenes.”
You’ll look like either a jackass trying to make yourself seem more important than you are, or a dumbass who doesn’t know how unimportant a PA is.