Use to access the files in the video_ts folder Explorer - standard file Manager of the Windows operating system. To run it you can for example click with the right mouse button on the icon "My computer" on the desktop and choose in the pop menu, the string "Explorer".
Navigate to the video_ts folder and find among its contents a file called video_ts.ifo. Click the right mouse button and from the context menu select "Open with". In the Launchpad dialog programs look in the list of apps player you use for playing DVDs, select it and click OK. That should be enough to play the video.
If your chosen player wasn't able to play contained in the video_ts folder of the movie, it is quite possible that either it is not designed to work with DVDs, or it does not have the mpeg-2 decoder and ac3. To fix these problems, you can either install the relevant codecs, either replacing the player on a more universal - for example, The KMPleer.
You can do without a Guide. Run a software player which has the option to work with DVDs, and select the menu command file open. For example, The player KMPleer this item is posted under "Open" called "Open file(s)" and duplicated the hot keys ctrl + o. In the file open dialog, browse to the video_ts folder and double-click video_ts.ifo playback starts. If you want to view separate parts of the film, it is possible to open files with extension vob - their names begin with the prefix vts and have the numbering corresponding to the order numbers of the parts. For example - vts_01_0.vob, vts_01_1.vob, etc.
A third method of viewing files from a video_ts folder is to re-establish with it the DVD. To do this, use any DVD burning program (e.g. Nero Burning ROM). As a result, you will receive a disk that can be viewed not only on PC but using a regular DVD player.