Balance Sheet Components - Schedule of Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Accrued Liabilities Current [Abstract]
Payments due to content publishers	$ 144,138	$ 106,576
Accrued cost of revenue	102,285	98,285
Marketing, retail and merchandising costs	44,023	43,645
Operating lease liability, current	32,715	35,647
Content liability, current	89,816	6,165
Other accrued expenses	64,425	57,350
Total Accrued Liabilities	$ 477,402	$ 347,668