Video sharing device, method, system and portable device

The invention discloses a video sharing method carried out in a portable device. The portable device can provide a main wireless network and a guest wireless network, wherein a primary device can be connected to the portable device through the main wireless network, and a guest device can be connected to the portable device through the guest wireless network. The method comprises the following steps: receiving guest configuration information transmitted by the primary device and set by the primary device in a video application, wherein the guest configuration information comprises guest authority information, and the guest authority comprises authority of watching videos; when monitoring that the guest device is accessed to the guest wireless network, acquiring the guest authority of the guest device; and when determining that the guest device has the authority of watching the videos according to the acquired guest authority, returning a local video resource list to the guest device, so that the guest device