src/app/dialogs/subscribe-dialog/subscribe-dialog.component.html

<h4 mat-dialog-title i18n="Subscribe dialog title">Subscribe to playlist or channel</h4>

<mat-dialog-content>
    <div class="container-fluid">
        <div class="row">
            <div class="col-12 mb-3">
                <mat-form-field color="accent">
                    <mat-label i18n="URL">URL</mat-label>
                    <input [(ngModel)]="url" matInput required aria-required="true">
                    <mat-hint><ng-container i18n="Subscription URL input hint">The playlist or channel URL</ng-container></mat-hint>
                </mat-form-field>
            </div>
        </div>
    </div>
    <mat-divider></mat-divider>
    <div class="container-fluid">
        <div class="row">
            <div class="col-12 mt-2">
                <mat-form-field color="accent">
                    <mat-label i18n="Custom name">Custom name</mat-label>
                    <input [(ngModel)]="name" matInput>
                </mat-form-field>
            </div>
            <div class="col-12">
                <mat-checkbox [(ngModel)]="download_all"><ng-container i18n="Download all uploads subscription setting">Download all uploads</ng-container></mat-checkbox>
            </div>
            <div class="col-12">
                <span i18n="Download time range prefix">Download videos uploaded in the last</span>
                <div>
                    <mat-form-field color="accent" style="width: 100px; text-align: center;">
                        <input type="number" matInput [(ngModel)]="timerange_amount" [disabled]="download_all">
                    </mat-form-field>
                    <mat-form-field class="unit-select">
                        <mat-select color="accent" [(ngModel)]="timerange_unit" [disabled]="download_all">
                            <mat-option *ngFor="let time_unit of time_units" [value]="time_unit + (timerange_amount === 1 ? '' : 's')">
                                {{time_unit + (timerange_amount === 1 ? '' : 's')}}
                            </mat-option>
                        </mat-select>
                    </mat-form-field>
                </div>
            </div>
            <div class="col-12 mt-2">
                <mat-form-field>
                    <mat-label i18n="Max quality">Max quality</mat-label>
                    <mat-select [disabled]="audioOnlyMode" [(ngModel)]="maxQuality">
                        <mat-option *ngFor="let available_quality of available_qualities" [value]="available_quality['value']">{{available_quality['label']}}</mat-option>
                    </mat-select>
                </mat-form-field>
            </div>
            <div class="col-12">
                <div>
                    <mat-checkbox [(ngModel)]="audioOnlyMode"><ng-container i18n="Streaming-only mode">Audio-only mode</ng-container></mat-checkbox>
                </div>
            </div>
            <div class="col-12 mb-4">
                <mat-form-field color="accent">
                    <mat-label i18n="Custom args">Custom args</mat-label>
                    <input [(ngModel)]="customArgs" matInput>
                    <button class="args-edit-button" (click)="openArgsModifierDialog()" mat-icon-button><mat-icon>edit</mat-icon></button>
                    <mat-hint>
                        <ng-container i18n="Custom args hint">These are added after the standard args.</ng-container>
                    </mat-hint>
                </mat-form-field>
            </div>
            <div class="col-12">
                <mat-form-field color="accent">
                    <mat-label i18n="Custom file output">Custom file output</mat-label>
                    <input [(ngModel)]="customFileOutput" matInput>
                    <mat-hint>
                        <a target="_blank" href="https://github.com/ytdl-org/youtube-dl/blob/master/README.md#output-template">
                        <ng-container i18n="Custom output template documentation link">Documentation</ng-container></a>.
                        <ng-container i18n="Custom Output input hint">Path is relative to the config download path. Don't include extension.</ng-container>
                    </mat-hint>
                </mat-form-field>
            </div>
        </div>
    </div>
</mat-dialog-content>

<mat-dialog-actions>
    <button mat-button mat-dialog-close><ng-container i18n="Subscribe cancel button">Cancel</ng-container></button>
    <!-- The mat-dialog-close directive optionally accepts a value as a result for the dialog. -->
    <button mat-button [disabled]="!url" type="submit" (click)="subscribeClicked()"><ng-container i18n="Subscribe button">Subscribe</ng-container></button>
    <div class="mat-spinner" *ngIf="subscribing">
      <mat-spinner [diameter]="25"></mat-spinner>
    </div>
</mat-dialog-actions>