近來國內網路社群逐漸普及，國內翻拍網路影音新聞已經成為電視新聞的重要素材來源。不少人宣稱Web2.0平台之後，使用者自創內容(user-generated content)得以擴大公民參與，但學界與實務界都有正反兩面的評價，本研究將從長期使用網路影音內容的台灣大學生，探查網路影音新聞可信度的影響因素為何？ 本研究採用紙本問卷調查，隨機抽樣國內十三所大專院校，有效樣本共達731份，研究結果顯示：（1）大學生主要獲知新聞訊息的管道為網路，公民影音素材對於電視新聞採用作為報導題材而言具其重要性，娛樂影音素材則衝擊新聞專業。（2）電視採用網路影音可信度及網路影音可信度皆獲得較低可信度評價，但在公民參與社會發展上有其意義。（3）大學生使用網路動機上愈偏離求知動機，且重視社交動機；愈注意電視採用網路影音作為素材的新聞，以及愈認同公民影音素材認知與娛樂影音素材認知會有傾向愈高的電視新聞採用網路影音專業可信度，另外，大學生使用網路動機上愈重視社交動機；越注意電視採用網路影音作為素材的新聞，以及愈認同公民影音素材認知與娛樂影音素材認知，會有傾向愈高的電視新聞採用網路影音參與可信度。（4）大學生使用網路動機上愈偏離求知動機；愈注意電視採用網路影音作為素材的新聞，以及愈認同娛樂影音素材認知會有傾向愈高的網路影音內容可信度，另外，大學生使用網路動機上愈偏向求知動機、社交動機與娛樂動機，以及愈認同公民影音素材、娛樂影音素材，會有傾向愈高的網路影音社會可信度。研究顯示網路影音可信度上雖然存疑，但對整體公民社會發展上，有其不容抹滅的意義。 / Social networks have been popular in Taiwan recently, and the online videos becomes the main source of TV news. An argument arises whether user-generated content can enhance civic participation after the appearance of Web 2.0 platform. Therefore, the purpose of thesis aims to examine the news credibility of Internet video news among Taiwanese college students who used to watch video content. The survey employed random sampling to collect 731 valid samples among 13 colleges. The important results of this thesis are listed as below: 1. Internet is the main outlet to gain news information for college students. Civic video is important theme of TV news, while entertainment video content has negative impact on journalism. 2. Both TV news which adapt Internet video and Internet video news have low credibility. 3a. College students who have lower information seeking motive and higher sociability motive for Internet use pay more attention on TV news which adapted Internet videos. 3b. College students who are more identified with civic videos and entertainment videos more likely think TV news which adapted videos have credibility. 3c. College students who have higher sociability motive for Internet use pay more attention on TV news which adapt online videos; 3d. College students who are more identified with civic videos and entertainment videos more likely think TV news which adapted videos have credibility. 4. College students who have less information seeking motives for Internet use pay more attention on TV news which adapt online videos, and college students who are more likely identified with entertainment news video have more credibility on Internet video news. In general, there are positive significant difference between online video credibility and the motives of information seeking, sociability, and entertainment. The results showed that although the credibility of online video is still in doubt, it still have positive devotions.