update cover video and channel IDs (#680)

src/mocking/data/raw/coverVideo.json

@@ -1,6 +1,6 @@
 {
   "video": {
-    "id": "1610",
+    "id": "1",
     "title": "Ghost Signals",
     "description": "How We Lost Trust In Authority, And Authority Taught Us To Distrust Ourselves",
     "views": 132,
@@ -17,7 +17,7 @@
     "size": 44851016
   },
   "channel": {
-    "id": "102",
+    "id": "1",
     "title": "SCHISM",
     "avatarPhotoUrl": "https://eu-central-1.linodeobjects.com/joystream/schismavatar_black.png",
     "follows": 48717,
@@ -39,7 +39,7 @@
     }
   },
   "license": {
-    "id": "1503",
+    "id": "1000",
     "customText": "Free to consume and share, no derivatives or adaptations",
     "attribution": "Jamie King 2020"
   }