cleaned up some code

youtube-dl commands are now simulated and displayed in the advanced panel

src/app/main/main.component.html

@@ -69,6 +69,7 @@
                     Advanced
                 </mat-panel-title>
             </mat-expansion-panel-header>
+            <p *ngIf="this.simulatedOutput">Simulated command: <i>{{this.simulatedOutput}}</i></p>
             <div class="container" style="padding-bottom: 20px;">
                 <div class="row">
                     <div class="col-12 col-sm-6">