With Vernier Video Physics, it is possible to download and upload video via Dropbox. This requires the Dropbox app and an account from http://www.dropbox.com

Downloading video from Dropbox:
1. Launch the Dropbox app and open the movie.
2. Tap the star icon to mark the movie as a favorite. This will start the movie download.
3. Once the movie has finished downloading, tap the download button (with the downward-pointing arrow) and choose Open in Video Physics. This button is disabled until the download is finished, which may take a minute or two, depending on the size of the movie.

Exporting video with marked points and graphs:
1. Open a movie with marked points.
2. Choose the Share button from the toolbar.
3. Choose Save to Camera Roll.

Uploading video:
Video captured in Video Physics or exported to the Camera Roll is available for upload to Dropbox with the following steps.
1. Launch the Dropbox app and tap the Camera icon.
2. Choose Existing Photo or Video.
3. Select your movie from Camera Roll or Saved Photos.