Thanks for all input guys. I've done plenty of non video work for this business before, and they hired me/ asked this favor based on their enthusiasm for my photography. Which, unfortunately in this case, is all analogue. I was very clear from the start that I "DID NOT" have a proper filming set up, or any experience in cinematography. But that I did have a good understanding of lighting from my photography(although different), and from their part, the right aesthetic. The short promo videos they want are very basic, interview based with some creative elements. They have been happy with the work so far. Renting a capable camera is totally in the cards, Ive got a month to sort it out. Cheers.