I'm sure it is a serious question; a serious question that gets asked in one form or another on this board several times each day. The problem with this particular serious question is that it gives the distinct impression that the poster can't be bothered to do any of their own research. Since they've posted here, they obviously have Internet access, therefore, plugging a phrase such as "DSLR with HD Video" into a search-engine would have given a starting point. A further query such as "<Camera> review" would provide a wealth of information.
Had the OP done a little work and posted a question with sufficient information, such as "I have $XXX to spend on a camera and lenses for a business I want to start centered around <type of photography>. I am considering cameras X, Y, and Z - what do you recommend?" I am willing to be that there would have been a slew of detailed, useful posts.
The simple fact is, many of the knowledgeable posters here don't see a lot of point in doing someone's work for them. They are more than willing to help, but not to do all the work.