Transcript for Couple receives lost GoPro filled with memories
And finally tonight, "America strong." The couple losing a gopro filled with memories, getting it back years later thanks in part to social media. It all started as an ordinary hike. I just see this silver looking thing and I look harder and I'm like, that's a gopro. Reporter: Their trek near scenic San Diego quickly turned into a quest to return a hidden treasure. He reaches for the gopro and it falls back into the water. Finally he found it again. I had kind of given up hope. Reporter: So just imagine the surprise when Rio villa and will Ezell get the gopro home, turn the camera on, and found videos of a couple from 2017. You can actually see the moment the camera was dropped and submerged in the water four years ago. Rio, determined to find the camera's owners, posted the video on tiktok with this message. "Found this gopro today lodged between the water and a rock at three sisters falls, San Diego. Help find them!" My thoughts while making this, what if they're not together anymore? Do they even want to see this footage? Reporter: The video now viewed more than 3.5 million times, including in just five hours by the long lost gopro owners, Alejandro Lopez and pricila Bernal from silicon valley. Not only are they still together, they're now married. Posting their own video to tiktok announcing, "We're the owners of the gopro. We got married!" We're, like, so happy and so grateful for her. Reporter: Just yesterday, Rio met with pricila and Alejandro. Their gopro returned, all thanks to tiktok, which can now be credited with preserving more than just dance moves but also cherished memories. Thanks so much for watching. David Muir right back here tomorrow night. I'm linsey Davis in New York. Good night.
This transcript has been automatically generated and may not be 100% accurate.