Add ability to filter out public videos from admin

shared/core-utils/videos/index.ts

@@ -1 +1,2 @@
 export * from './bitrate'
+export * from './privacy'

shared/core-utils/videos/privacy.ts

@@ -0,0 +1,9 @@
+import { VideoPrivacy } from '../../models/videos/video-privacy.enum'
+
+function getAllPrivacies () {
+  return [ VideoPrivacy.PUBLIC, VideoPrivacy.INTERNAL, VideoPrivacy.PRIVATE, VideoPrivacy.UNLISTED ]
+}
+
+export {
+  getAllPrivacies
+}