As per title you can get video description of search item through web site.
YouTube.com is handled by Google.YouTube.com is the biggest laibrary of video data of different item such as, search for movie, songs, actor, singer, celebrity, leader, kittchan item, house hold item, banking, education etc. means mostly any thing you need.
Download on your mobile YouTube application from google play and you will be able to watch just video.For download video you download Tubemate application from googe play, and if you download TubeMote application you will be able to search video from your mobile and wiil be able to play video on your laptoap or PC by logging https://tubemote.com and search from your mobile.
Recent devolpement from youtube.com is to play video offline whithout break in video. no need of line that is very great thing and available anytime any place.In sort YouTube is very useful web site.I suggest to get it.