FOR multimedia addicts, Asia Concepts is selling the Flexcam from VideoLabs. This colour desktop video camera, with built-in stereo microphones, provides an 18-inch flexible ''gooseneck'' for precise lens positioning and offers a wide focus range from 0.5 centimetre to infinity. The camera includes automatic white balance and exposure functions with a low light sensitivity of 2.5 lux. With industry standard PAL or NTSC output, the camera can be used with PCs, Macs and workstations or any other equipment which can accept video input. The Hong Kong list price for the Flexcam is $5,775.