Complex sentence: Dryan started uploading covers to youtube in 2010 until in 2014 he participates in the contest "La Voz España" but was not selected, but the Universal Music Spain producer noticed him and that same year he launched himself as a soloist.
Split into simpler sentences: Dryan started uploading cover versions of songs to Youtube in 2010, until in 2014 he participated in the contest "La Voz". Although he was not selected, a Universal Music Spain producer noticed him, and in the same year he began a career as a soloist.