Malls are private property, so you generally need approval from mall management before filming. The usual process is to contact the management office, explain exactly what you want to shoot, where, how long it will take, and that it’s a short promotional/demo video focused on the kiosk location rather than shoppers or other stores.

If your client already has an agreement for the kiosk, that should help; if not, approval may be much harder. Some malls require a permit, fee, proof of purpose, and/or that security escort you during filming. Policies vary by mall.

A practical tip is to ask to shoot before opening hours. That reduces privacy concerns and avoids filming customers, which may make management more willing to approve the request.

In short: get written permission from mall management first, be clear about the limited scope, and ask about permits, fees, insurance, and any escort or time restrictions.