Modifying video frames

A method comprising: displaying a UI for display of received video; detecting selection of a UI displayed button while a received video frame is displayed; in response, disabling the display of video frames received after the received video frame; determining a position of a face of a user in the received frame; receiving a plurality of drawing inputs while the button is selected, each drawing input defining image data to be applied at a position on said face; modifying the video frame in accordance with the drawing inputs by applying the image data to each of the positions; detecting a condition and in response, for each video frame received after the detection, determining a position of the face in the frame to determine the location of the positions in the frame, applying the image data to each of the positions, and displaying the modified video frame in the UI.