Bias is related to Opinion. Opinion is the opposite of Partial. Partial is related to Unfair. 
Video is related to Duty. Duty is related to Related. Related is related to Wave. Wave is related to Tide. 
Bias <--RelatedTo--> Opinion <--Antonym--> Partial <--RelatedTo--> Unfair 
Video <--RelatedTo--> Duty <--RelatedTo--> Related <--RelatedTo--> Wave <--RelatedTo--> Tide 