Landscape-only video capture (ideas)

This is a series of ideas related to allowing filming with a phone only when it is held in landscape mode, avoiding the vertical video syndrome.

1. Allowing the use of the phone camera only in landscape mode
Let's say you want to shoot a video with your phone and you press the camera button when in portrait mode, but the phone tells you that you can't do it on portrait mode. What happens next? You turn the phone sideways, tap the camera button again, and volia! you are finally shooting a video.

As you've read just now, this is a feature that locks the use of the video camera function to landscape mode, rendering it inaccessible when in portrait mode (albeit the photo function can be used in both portrait and landscape mode).

2. "Turn the phone to start shooting"
This method also restricts the video camera function to landscape mode. This time, however, allows the phone to start shooting right after the phone has been turned sideways.

How it works is fairly simple: once the user taps the video button, the phone tells the user to "turn the phone sideways to start shooting"; the phone automatically starts shooting once the user turns the phone sideways (although the user can start recording by tapping the video button once the phone is already in landscape mode). The phone stops shooting once the user turns the phone back into portrait mode, or when the user taps the video button again to stop recording.

Another way is using the video function without tapping the camera button; this means that the user can only record video when he turns the phone sideways, and that video shooting can be stopped only by turning the phone back to its vertical position.