How many minutes of video on 8 gb?

The Panasonic AG-HMC150, at the highest quality setting (1920 x 1080 resolution @ 21 Mbps) will record for 45 minutes onto an 8 GB card. At lowest quality setting (1440 x 1280, 6 Mbps) it will record for approximately 3 hours. Depending on your camera, image resolution and bitrate, as they say, "your mileage may vary!"