Youtube restore spacebar to scroll

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Youtube restore spacebar to scroll",
  "description": "A simple extension to restore the default browser behavior of scrolling when pressing the spacebar, on youtube.com",
  "version": "1.0.1",
  "manifest_version": 2,
  "content_scripts": [
    {
      "run_at": "document_end",
      "matches": [
        "https://www.youtube.com/*"
      ],
      "js": [
        "youtube.js"
      ]
    }
  ]
}