Briefly thrilling, but still - a promotional video.

　　有一點點驚險，但那畢竟只是- - -一段宣傳片。

　　Libraries also use toolbars for promotional purposes.

　　圖書館使用工具欄也有提高業(yè)務的目的。

　　Just make sure not to come across as too self-promotional.

　　只需要保證沒有太過自我宣傳。