Media Screen Parameters
Section 9.1.5 pp 728 - 733
Table 9.18 defines the W key that specifies whether the window in which the media object plays should be a floating window, a full-screen window, a hidden window, or the rectangle occupied by the screen annotation.
Are there accessibility issues with floating windows, full-screen windows, or hidden windows?
If floating windows are permitted, Table 9.19 defines parameters for the floating window. Parameters that may be important for accessibility include title bars and titles, controls to close the window, whether the window is resizable, the position of the floating window, and what to do if the floating window is positioned totally or partially offscreen.