Lock Samsung Galaxy S3 touchscreen and keys during video playback Posted on Sunday, June 10th, 2012 at 12:50 pm.Written by androidizen Many people asked about this one so here is how to Lock Samsung Galaxy S3 touchscreen and keys during video playback. Leave a Reply Click here to cancel reply. Name (required) Email (will not be published) (required) Website Comment XHTML: You can use these tags: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>