Having a professional video production company making the video for you, as an individual or a company or organization can be very interesting. However, to ensure you end up with a movie you can be proud of, it is very important to take the time to find a company that really knows what they are doing, as a whole and specifically for this type of project. The best way to confirm this is to look at their portfolio for hiring experts for video marketing.
The number one thing you will see when you review your portfolio of video production company is the quality of their recordings. You'll find it in a heartbeat if their past video quality is not something that you will be happy with for your project. If this is the case, you may want to reconsider them as an option. What they provide to clients before is probably as good as it will get for you. That said, be sure to view the video even those that look good with very intelligent eyes.
If the information is available, and you may be able to tell this from their portfolio, consider what type of business or individual they tend to work with. Ideally, a good company to work with will have considerable experience working with customers like you, whether you are an individual, organization, small business or large corporation.
If this is not true, they probably are still fine, but the types of customers they tend to get probably reflect the type of work they are best and how they are used to doing business. Finding a company with a variety of large customers, as long as it includes a lot of other people like you.