Vuela Alto is a nontraditional choir, in that they don't rehearse or perform together. Instead, they learn and record their parts individually, which is later combined into a video of the "virtual" a cappella choir. Homar Sánchez Díaz is the director (and a friend I met while singing in UNAM's choir), and the singers are students at the school where he teaches in the State of San Luis Potosí.
Roberto Gómez Bolaños (21 February 1929 – 28 November 2014), more commonly known by his pseudonym Chespirito, was a Mexican screenwriter, actor, comedian, film director, television director, playwright, songwriter, and author. He is widely regarded as one of the most important Spanish-language humorists of the 20th century.
He was internationally known for writing, directing, and starring in the Chespirito (1968), El Chavo del Ocho (1971), and El Chapulín Colorado (1972) television series. The character of El Chavo is one of the most iconic in the history of Latin American television, and El Chavo del Ocho continues to be immensely popular, with daily worldwide viewership averaging 91 million viewers per episode.
As far as I know, in the U.S., Chespirito was only shown in Spanish, so it's not well-known to the general population. However, people in Mexico and throughout Latin America (including Brazil, where it was translated into Portuguese) grew up with El Chavo del Ocho (The Boy from No. 8) and El Chapulín Colorado (The Red Grasshopper). (If you're interested, this is an interesting opinion piece in The New York Times, "What ‘Chespirito’ Left Us, " by Ilan Stavns, about Chespirito in Mexico and Hispanics in the U.S.)
Enjoy the video (and probably the cutest group of chapulines colorados you'll ever see!)