Lee Frederiksen argues that given the value of a new client to a professional services firm that video is a channel that can not be ignored. True enough but it is extremely difficult to do well.
The talking head middle-aged man in a suit discussing earnestly why they love their job does not do it for your clients. They don't care!
Webinars, free advice, is a much more compelling proposition.
Either way, make your point quickly. One third of your audience won't make it past 30 seconds.
Also it is worth using Vimeo not Youtube - it doesn't show the number of views. With the exception of a dead blog, there is nothing more amateurish than a video with '17 views'.