LOS ANGELES -- There's nothing quite like a YouTube love story.

YouTube musicians Sam Tsui and Casey Breves released a music video -- with footage from their wedding -- for their new single "The Promise" on Tuesday.

The duo tied the knot in April 2016, just one day after Tsui came out publicly to his fans, at The Carondelet House in Los Angeles.

“It has been so awesome to share more of myself this year with all of you, and this video is perhaps one of the most special and personal I’ve shared with you yet," Tsui wrote in the YouTube video description. "As many of you know, I got married in April to the amazing Casey Breves, and wanted to share a little bit of that day with you because I really do consider you, the #Samily, to be a kind of family that means so much to me – please enjoy this virtual invitation to our wedding, and the single we wrote to accompany it – it’s an anthem about the power and timelessness of love. Sending our love out to the whole Samily!”

Tsui, who has over 2.5 million subscribers to his channel, has collaborated with Breves a handful of times in the past.

4/16/16- Couldn't be happier. Photo @839photo pic.twitter.com/t2X2FuFiSo

— Casey Breves (@CaseyBreves) April 18, 2016

The duo's most popular video together is a cover of Ed Sheeran’s “Thinking Out Loud” and Sam Smith’s “I’m Not The Only One," which has amassed 33.6 million view since being posted in January 2015.