1. Download a video player on your phone
Download a video player on Samsung galaxy s4 is the simplest way in order to watch most of the common videos on the handset without conversion, anytime and anywhere.
2. Getting help from computer
If you want watch videos of all kinds on Galaxy S4 like iTunes M4V movies (usually the .M4V movies on iTunes are DRM protected) or Xvid, DivX, RM, MTS, M2TS videos on the Galaxy s4, we aren't able to watch iTunes videos or movies on Galaxy s4 without authorizing. The key to make it possible to transfer iTunes M4V videos or other videos to the device is remove DRM from iTunes .M4V videos, and then convert the iTunes M4V movies or other videos formats to MP4 with H.264 codec by using a video converter. And here I recommend you to use this HD video converter, because it can convert videos at fast speeds and high quality.
3. Save YouTube HD Video to Samsung Galaxy S4
Today lots of people prefer to enjoy different kind of videos on YouTube like news, movie, music and others on their android phones, so how can we watch HD YouTube Videos without any limitless? There are many method that we can use and the best way is save the youtube videos on our device. Getting help from computer could make YouTube downloading be much easier, such as use a free youtube downloader just go to online download sites like keepvid.com or savevid.com/ .
Here is the official Galaxy S4 YouTube videos from Samsung: