The most common, and most suitable lighting setup for your marketing video will be a Standard 3 Point Lighting setup.
Standard 3 Point Lighting consists of:
Key Light - This is the dominant light, which should be set at 45° from your subject.
Fill Light – This is a softer light, mirror side to Key Light and is used to fill in shadows
Back Light – This will be placed at the back of your setup facing the key Light at a 45° to your subject.
This set up is standard, and would normally be used for most digital marketing videos unless you are wanting to create some kind of special atmosphere or effects.