Fix video URL focus when clicking on label

Author: ablazejuk

index.html

@@ -38,9 +38,9 @@ <h2>Musicians' Helper - Repeater</h2>
                     </div>
 
                     <div class="form-group row">
-                        <label class="col-md-4 col-form-label" for="video_url">Video URL</label>
+                        <label class="col-md-4 col-form-label" for="video-url">Video URL</label>
                         <div class="col-md-8 col-sm-12">
-                            <input id="video-url" class="form-control" name="video_url" type="text" placeholder="https://...">
+                            <input id="video-url" class="form-control" name="video-url" type="text" placeholder="https://...">
                             <div id="url-invalid" class="invalid-feedback">
                                 Invalid URL. Insert a valid YouTube URL.
                             </div>