Youtube is available to all. Anybody can upload a video. If I upload a video on that it will give you my opinion. If the video is yours, it will reflect your ideas. So we cant go by these videos. These videos you can see for your entertainment. It is my opinion. Your experience also says that. If a video gets more views the uploader will get more money. The information coming through these videos is also not authenticated. Before you consider as correct information, you should get it verified and confirm your self as a correct one. Otherwise, you will be misled. My experience on youtube is in this direction only. So use youtube for watching some stage shows and time passing programmes on TV only. But not for product selection or verifying the correctness of the information and knowledge improvement.