dev@505: <button mat-icon-button (click)="emitFastRewindStart()">
dev@505:   <mat-icon>skip_previous</mat-icon>
dev@330: </button>
dev@505: <button mat-icon-button (click)="emitPlayPause()">
dev@505:   <mat-icon>
dev@236:     <ng-template [ngIf]="isPlaying()">pause</ng-template>
dev@236:     <ng-template [ngIf]="!isPlaying()">play_arrow</ng-template>
dev@505:   </mat-icon>
dev@27: </button>