You can also try these related scripts:

• embed.nicovideo.jp 1080p support - ニコニコ動画の埋め込みプレーヤーでの画質を上げます。ログインしていないと埋め込みプレーヤーでの視聴に失敗するようになるので注意してください。
• Append Tag Searching Tub - Adds “Keyword”, “Tags”, “My List”, “Images” and “Live” search tabs to all of the Niconico search boxes.
• Clone Turning Page Button in nicovideo - Also shows the pagination on the top of Nico Live search r###lt, Lives by Category page, and Nico Video user page.
• NicoVideo Post to SBM with selected tags - allows to search or post to SBM with multiple tags from tag list in NicoVideo watching page.
• [niconico video] Add the "Add My List" button to search r###lt page - Add the "Add My List" button to niconico video search r###lt page