The differences in color in your screen shots is more than a rec.601 vs. If you use a full range matrix you will get the wrong brightness - darks will be too light, brights won't be bright enough. Almost all professional video sources (DVD, Blu-ray, Youtube, etc.) use limited range. There are also two brightness/contrast conversion methods: limited range and full range. Some players will follow the flag, some won't. It's possible to flag which matrix to use withing the video. Some will switch depending on whether the video is SD or HD. Some players always use one, some always use the other. In general, rec.601 is used for SD, rec.709 for HD. They results in slightly different colors. The two main ones are called rec.601 and rec.709. There are several different algorithms for doing so. It has to be converted to RGB to be displayed.
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