There is no legal requirement for a startup to provide bilingual content outside of the tv/radio sphere. Legally Youtube would not have been effected if it had

There is no legal requirement for a startup to provide bilingual content outside of the tv/radio sphere. Legally Youtube would not have been effected if it had started in Canada. That being said if you are an english-language startup and you wish to enter the Quebec market there is a general social expectation that you'll offer your content in both official languages. Target's case is a bit of an one off exception as it is an american company who bought a Canadian retailer.