Question: I know that usually a short video with audio is called "clip", but at least for me, it's associated with a music video, MTV, etc, and doesn't sound professional enough.

So is there a single word for a short video promoting a company, showing the company skills and past achievements etc?

It is going to be used in a presentation which is going to start with the video, and contains Table of Contents as the first slide. So far we have "[company name] Video Clip" but like I said in the beginning, it doesn't feel right. Neither me nor the audience of the presentation are native English speakers, if it matters.

Answer: 
Surely this is a good one :-)

> 
> A **showreel** (also known as a **demo reel**) is a short piece of
>  video or film footage showcasing an actor's previous work. Usually
>  four to six minutes in length, a showreel typically supplements an
>  actor's résumé and is used to promote the artist's skill, talent, and
>  experience to acting agents and casting directors.
> 
> 
> [From Wikipedia, the free encyclopedia](http://en.wikipedia.org/wiki/Showreel_%28actors%29)
> 
> 
>
*[Presentation](http://www.thefreedictionary.com/presentation) video* is the expression generally used: 

> 
> * (Commerce) a verbal report presented with illustrative material, such as slides, graphs, etc: a presentation on the company results.
> 
> 
> 

(TFD)