The footage above was shot through the windows of Orion's crew module. For many of us, this kind of video is the closest we'll ever get to the awesome and terrifying experience of reentry from space.
It starts 10 minutes before splashdown, just when Orion started to hit the atmosphere. Just two minutes late, the spacecraft hits its peak temperature, with the friction of the atmosphere against its heat shield causing plasma that shifts from white to yellow to lavender to magenta as things get hotter. It's during this period that the livestream blacked out, because the high temperatures made it impossible to maintain the data link.
Then, of course, Orion makes it through: As it approaches the Pacific, Orion's parachutes deploy and slow it down to 20 mph. From NASA:
Orion traveled 3,600 miles above Earth on its 4.5-hour flight test – farther than any spacecraft built for humans has been in more than 40 years. In coming back from that distance, it also traveled faster and experienced hotter temperatures – 20,000 mph and near 4,000 degrees Fahrenheit, to be exact. Orion will travel faster and experience even higher temperatures on future missions, when it returns from greater distances, but this altitude allowed engineers to perform a good checkout of Orion's critical systems – in particular its heat shield.