2 files changed, 6 insertions, 1 deletions

diff --git a/client/src/app/shared/misc/utils.ts b/client/src/app/shared/misc/utils.ts
index b5bf99be2..b9aa223cf 100644
--- a/client/src/app/shared/misc/utils.ts
+++ b/client/src/app/shared/misc/utils.ts
@@ -66,6 +66,11 @@ function objectToFormData (obj: any, form?: FormData, namespace?: string) {
 
     if (obj[key] === undefined) continue
 
+    if (Array.isArray(obj[key]) && obj[key].length === 0) {
+      fd.append(key, null)
+      continue
+    }
+
     if (obj[key] !== null && typeof obj[ key ] === 'object' && !(obj[ key ] instanceof File)) {
       objectToFormData(obj[ key ], fd, key)
     } else {
diff --git a/client/src/app/videos/+video-edit/shared/video-edit.component.ts b/client/src/app/videos/+video-edit/shared/video-edit.component.ts
index af4438bd2..d4567e26c 100644
--- a/client/src/app/videos/+video-edit/shared/video-edit.component.ts
+++ b/client/src/app/videos/+video-edit/shared/video-edit.component.ts
@@ -80,7 +80,7 @@ export class VideoEditComponent implements OnInit {
     this.form.addControl('licence', new FormControl('', VIDEO_LICENCE.VALIDATORS))
     this.form.addControl('language', new FormControl('', VIDEO_LANGUAGE.VALIDATORS))
     this.form.addControl('description', new FormControl('', VIDEO_DESCRIPTION.VALIDATORS))
-    this.form.addControl('tags', new FormControl(''))
+    this.form.addControl('tags', new FormControl([]))
     this.form.addControl('thumbnailfile', new FormControl(''))
     this.form.addControl('previewfile', new FormControl(''))
     this.form.addControl('support', new FormControl('', VIDEO_SUPPORT.VALIDATORS))