Kamera is a free jailbreak tweak available on Cydia’s ModMyi repo that enables you to go directly to the front-facing or rear-facing mode in the Camera.app via the Notification Center. An other option was added to Kamera that allows you to use a long tap to go straight to video mode. iDB created a Hands-on Video that can be seen above.

Kamera can be downloaded from Cydia for free using this direct link.