"Stay alive" utility for Ubuntu?

[Jeffrey Needle]

> In your specific example (movie playing), specific applications would
> work fine with it. For example, the default Ubuntu media player (totem)
> has an option to disable screensaver when playing (Edit -> Preferences
> -> Display -> Disable screensaver). Another common player that should
> also work is VLC (which is enabled by default - if not you can go to
> Tools -> Preferences -> "Show settings -> All" -> Video -> check
> "disable screensaver").

Perfect!!!  Thanks so much -- the very thing I needed to make this work.  
I really appreciate this.

Best.