Watching online movie without downloading is called movie streaming. How this work? When you watch movie streaming you don't have to wait downloading a file to play it. Instead of this, movie is sent in a continuous stream of data and is played as it arrives. So if you still hesitate about watching movies on stream, here is some most common benefits and minuses: First most obvious thing is that you save time on downloading, other good advantage is instantness, you just have to decide what movie you will watch and click on play, one of bigger minuses in past was quality of video, but now streaming movies is on good way to equalize with downloading, and more sites now is offering even HD quality streams. Second disadvantage can be internet speed, for HD movies needed to have more than 1 Mbps and sometimes up to more than 3 Mbps, but still you can watch movies in slightly lower quality without any problems.
123Movies has simple and easy to use design without any misleading features. Movies are embed on the site so you will not need to watch it on third party host sites. Database is big and frequently is updated, there are movies from all genres and years. In the past they were site with best quality streams, but in last period few new sites take that primate from them. There is option to register on the site, but it is not needed if you don't want. 123Movies is one of the better site for free movie streaming.