update docs

src/test/resources/tests/test_add_silence.jvc

@@ -1,6 +1,6 @@
 {
   "assets": [
-    // this US government videos is covered by copyright
+    // this US government video is covered by copyright
     {
       "name": "vid2",
       "path": "https://archive.org/download/gov.archives.arc.49442/gov.archives.arc.49442_512kb.mp4",