allow selecting MP4 in the GUI

ui/src/app/app.module.ts

@@ -4,6 +4,7 @@ import { FormsModule } from '@angular/forms';
 import { NgbModule } from '@ng-bootstrap/ng-bootstrap';
 import { HttpClientModule } from '@angular/common/http';
 import { FontAwesomeModule } from '@fortawesome/angular-fontawesome';
+import { CookieService } from 'ngx-cookie-service';
 
 import { AppComponent } from './app.component';
 import { EtaPipe, SpeedPipe } from './downloads.pipe';
@@ -25,7 +26,7 @@ import { MeTubeSocket } from './metube-socket';
     HttpClientModule,
     FontAwesomeModule
   ],
-  providers: [MeTubeSocket],
+  providers: [CookieService, MeTubeSocket],
   bootstrap: [AppComponent]
 })
 export class AppModule { }