Motivation Training Videos? I'm not sure of their value, but hope Ideas and Training won't mind their trading their image for a link.
This Bnet.com article by Geofffrey James, "Getting Motivated: Here's How" is refreshing -- though of course I believe motivation is an internal thing, and no one can "motivate" someone else in any lasting way. We can provide information, insights, and perhaps encourage someone to connect with their passions, but we can't do it for 'them'.
Similarly, what do we do if our key employees seem to be "losing motivation". If it is an isolated situation, I would look to see if there are some external elements affecting the employee's life -- if the issue is becoming more general in the organization, the owner/CEO needs to look into him/herself. Something is wrong, clearly with the leadership and business structure. The paradox is that there many be many valid 'causes' masking the underlying real issue(s) or (more troubling) the causes set in motion a chain of events that lead to seemingly unintended consequences.
Having survived a rather major long-evolving business decline, however, I now believe you really need to be tuned into your organization's internal culture AND external market; don't rely on third-hand opinions (though consider them carefully). You have to remain in touch, and connected, and change course when you see signs of "demotivation" creeping into your environment.