Add warning in download modal if needed

client/src/app/shared/shared-video-miniature/video-download.component.html

@@ -18,6 +18,10 @@
 
   <div class="modal-body">
     <div class="form-group">
+      <div class="alert alert-warning" *ngIf="isConfidentialVideo()" i18n>
+        The following link contains a private token and should not be shared with anyone.
+      </div>
+
       <div class="input-group input-group-sm">
         <div class="input-group-prepend peertube-select-container">
           <select *ngIf="type === 'video'" [(ngModel)]="resolutionId" (ngModelChange)="onResolutionIdChange()">
@@ -30,7 +34,7 @@
         </div>
 
         <input #urlInput (click)="urlInput.select()" type="text" class="form-control input-sm readonly" readonly [value]="getLink()" />
-        <div class="input-group-append">
+        <div class="input-group-append" *ngIf="!isConfidentialVideo()">
           <button [cdkCopyToClipboard]="urlInput.value" (click)="activateCopiedMessage()" type="button" class="btn btn-outline-secondary">
             <span class="glyphicon glyphicon-copy"></span>
           </button>

client/src/app/shared/shared-video-miniature/video-download.component.ts

@@ -116,7 +116,7 @@ export class VideoDownloadComponent {
     const file = this.videoFile
     if (!file) return
 
-    const suffix = this.video.privacy.id === VideoPrivacy.PRIVATE || this.video.privacy.id === VideoPrivacy.INTERNAL
+    const suffix = this.isConfidentialVideo()
       ? '?access_token=' + this.auth.getAccessToken()
       : ''
 
@@ -129,6 +129,10 @@ export class VideoDownloadComponent {
     }
   }
 
+  isConfidentialVideo () {
+    return this.video.privacy.id === VideoPrivacy.PRIVATE || this.video.privacy.id === VideoPrivacy.INTERNAL
+  }
+
   getSubtitlesLink () {
     return window.location.origin + this.videoCaptions.find(caption => caption.language.id === this.subtitleLanguageId).captionPath
   }