See the comments for what this does.

```css
/* Floorb's CyTube MLPA cinema mode user style
 * Created to avoid static UI elements that clutter up the UI when watching on the big screen,
 * and more importantly to avoid burning them in to a CRT.
 * Also shows the drink bar in cinema mode.
 */

/* Keep the drink bar visible */
body.cinemachat #drinkbarwrap {
  position: relative;
  z-index: 9999;
  top: -55px;
}

/* Delet chat input */
body.cinemachat #chatwrap > form {
    display: none;
}

/* Delet chat header */
body.cinemachat #chatheader {
    display: none;
}

/* Get rid of static borders */
body.cinemachat #chatwrap #messagebuffer {
    border: none;
    height: 100% !important;
    overflow: hidden; /* get rid of the scroll bar */
}

/* Get rid of static buttons */
body.cinemachat #cinematoggle, #cinemasizeinc, #cinemasizedec {
    display: none;
}

/* Move the poll overlay to not conflict with the drink bar */
body.cinemachat:not(.synchtube) #pollwrap div.active:not(.dismissed) {
    left: 5px !important;
    top: 60px !important;
}
```