I bought a composite-video-to-usb adaptor. I want to stream video game in ubuntu. How can I do that?

My environment:

• Monoprice USB Video and Audio Grabber
• Ubuntu 11.04

The relevant output of lsusb:

Bus 001 Device 011: ID 0572:262a Conexant Systems (Rockwell), Inc. 

The relevant output of sudo lshw:

    *-usb:0
         description: USB Controller
         product: 82801JI (ICH10 Family) USB UHCI Controller #4
         vendor: Intel Corporation
         physical id: 1a
         bus info: pci@0000:00:1a.0
         version: 00
         width: 32 bits
         clock: 33MHz
         capabilities: uhci bus_master cap_list
         configuration: driver=uhci_hcd latency=0
         resources: irq:16 ioport:f0e0(size=32)
    *-usb:1
         description: USB Controller
         product: 82801JI (ICH10 Family) USB UHCI Controller #5
         vendor: Intel Corporation
         physical id: 1a.1
         bus info: pci@0000:00:1a.1
         version: 00
         width: 32 bits
         clock: 33MHz
         capabilities: uhci bus_master cap_list
         configuration: driver=uhci_hcd latency=0
         resources: irq:21 ioport:f0c0(size=32)
    *-usb:2
         description: USB Controller
         product: 82801JI (ICH10 Family) USB UHCI Controller #6
         vendor: Intel Corporation
         physical id: 1a.2
         bus info: pci@0000:00:1a.2
         version: 00
         width: 32 bits
         clock: 33MHz
         capabilities: uhci bus_master cap_list
         configuration: driver=uhci_hcd latency=0
         resources: irq:18 ioport:f0a0(size=32)
    *-usb:3
         description: USB Controller
         product: 82801JI (ICH10 Family) USB2 EHCI Controller #2
         vendor: Intel Corporation
         physical id: 1a.7
         bus info: pci@0000:00:1a.7
         version: 00
         width: 32 bits
         clock: 33MHz
         capabilities: pm debug ehci bus_master cap_list
         configuration: driver=ehci_hcd latency=0
         resources: irq:18 memory:e0525c00-e0525fff
    *-multimedia
         description: Audio device
         product: 82801JI (ICH10 Family) HD Audio Controller
         vendor: Intel Corporation
         physical id: 1b
         bus info: pci@0000:00:1b.0
         version: 00
         width: 64 bits
         clock: 33MHz
         capabilities: pm msi pciexpress bus_master cap_list
         configuration: driver=HDA Intel latency=0
         resources: irq:43 memory:e0520000-e0523fff
    *-usb:4
         description: USB Controller
         product: 82801JI (ICH10 Family) USB UHCI Controller #1
         vendor: Intel Corporation
         physical id: 1d
         bus info: pci@0000:00:1d.0
         version: 00
         width: 32 bits
         clock: 33MHz
         capabilities: uhci bus_master cap_list
         configuration: driver=uhci_hcd latency=0
         resources: irq:23 ioport:f080(size=32)
    *-usb:5
         description: USB Controller
         product: 82801JI (ICH10 Family) USB UHCI Controller #2
         vendor: Intel Corporation
         physical id: 1d.1
         bus info: pci@0000:00:1d.1
         version: 00
         width: 32 bits
         clock: 33MHz
         capabilities: uhci bus_master cap_list
         configuration: driver=uhci_hcd latency=0
         resources: irq:19 ioport:f060(size=32)
    *-usb:6
         description: USB Controller
         product: 82801JI (ICH10 Family) USB UHCI Controller #3
         vendor: Intel Corporation
         physical id: 1d.2
         bus info: pci@0000:00:1d.2
         version: 00
         width: 32 bits
         clock: 33MHz
         capabilities: uhci bus_master cap_list
         configuration: driver=uhci_hcd latency=0
         resources: irq:18 ioport:f040(size=32)
    *-usb:7
         description: USB Controller
         product: 82801JI (ICH10 Family) USB2 EHCI Controller #1
         vendor: Intel Corporation
         physical id: 1d.7
         bus info: pci@0000:00:1d.7
         version: 00
         width: 32 bits
         clock: 33MHz
         capabilities: pm debug ehci bus_master cap_list
         configuration: driver=ehci_hcd latency=0
         resources: irq:23 memory:e0525800-e0525bff

The relevant output of dmesg:

[18953.220035] usb 1-1: new high speed USB device using ehci_hcd and address 6
[19964.761076] Linux video capture interface: v2.00
[19964.767112] usbcore: registered new interface driver uvcvideo
[19964.767115] USB Video Class driver (v1.0.0)