Good lighting is an important component of creating quality content. It is also a real challenge and can get expensive quickly. Investing some cash into a high quality camera is great, but if no considerations are being made to the space being used for the shoot, the overall improvement will be marginal.
Start with the basics. Where is the subject positioned in the space and where is the light source (natural or artificial) coming from? Everyone has seen the usual web conferences where half the attendees are hidden in the dark because they are in front of a window or unflattering details are extremely visible because the individual has an LED desk lamp shining right in their face. With some slight adjustments, these pitfalls can be avoided.