diff --git a/src/CommandLineParser.ts b/src/CommandLineParser.ts
index 69f8681..f3c3093 100644
--- a/src/CommandLineParser.ts
+++ b/src/CommandLineParser.ts
@@ -91,6 +91,7 @@ export const argv: any = yargs.options({
         default: false,
         demandOption: false
     },
+    // NOTE: useless
     noCleanup: {
         alias: 'nc',
         describe: 'Do not delete the downloaded video file when an FFmpeg error occurs',
@@ -98,12 +99,14 @@ export const argv: any = yargs.options({
         default: false,
         demandOption: false
     },
+    // NOTE: useless
     vcodec: {
         describe: 'Re-encode video track. Specify FFmpeg codec (e.g. libx265) or set to "none" to disable video.',
         type: 'string',
         default: 'copy',
         demandOption: false
     },
+    // NOTE: useless
     acodec: {
         describe: 'Re-encode audio track. Specify FFmpeg codec (e.g. libopus) or set to "none" to disable audio.',
         type: 'string',