There's a nice list of .live sites can be found there, many with potential SEO in the right hands
if you type in: afternic(dot)com(slash)326005
Some of them are (maybe not listed in the page above):
A soccer cup that takes place every year, it'll hit top in the searches in the area on the time of the tournament
copalibertadores
libertadores
Making allusion to DirecTV or if you have a streaming channel where you can direct tv, live to the viewers
directtv
ivt can be for ITV.com the biggest UK TV network or international TV channel streaming
latam it's a generic acronym meaning all Latin American live events or shows, you could have streams for nba.latam instead of www(dot)nba(dot)com/enebea/nba_global_tv.html
skysport could be for streaming of all sky related sports, in the near future, even drone races!
marca Marca is the biggest sports magazine in Spain, but it's generic as "marca" means "brand", so it could have many brands events as subdomains like marca(dot)live/nike or marca(dot)live/puma to give some examples
hbo aside from the obvious*, could be for live events of the Hollywood Bowl Orchesta, Hamilton's Basketball Organization (Recreation League in Canadian City) and even Huff, Barrington and Owens (Health tech informatics)
tigo, tigosports and tycsports are some of the bggest referrals of sports in latin america, so those are great for the firms themselves
Well, those can be great examples of how to use the .live extensions