What event happened first, numerous businesses using Flash-based websites to launch new products, or Youtube switching to HTML5 technology?
return numerous businesses using Flash-based websites to launch new products ;return Youtube switching to HTML5 technology ;return when  was  #1 ;return when  was  #2 ;return which is lowest of #3 ,  #4
['select', 'select', 'project', 'project', 'comparison']