Google is the parent of YouTube and developed the Android mobile operating system.
Larry Page and Sergey Brin founded Google in 1998 while they were graduate students at Stanford University. Its web search engine grew from a research project called BackRub, whose ranking system used links between webpages as signals of importance.
Google acquired YouTube in 2006. YouTube remained a distinct video platform, but became part of Google's expanding internet-services business. Google also acquired Android Inc. in 2005 and developed Android into a widely used operating system for smartphones, tablets, televisions, cars, and other devices.
Google is often confused with Alphabet, its corporate parent since a 2015 restructuring. In that structure, Google became the largest subsidiary, while Alphabet held other businesses separately. This question asks for the operating company associated with YouTube and Android, not the parent-company name used for the stock listing.