Facebook will start selling video advertisements from Thursday, in an effort to capture a share of the $66.4bn TV advertising market.
The ads will automatically play in consumers' news feeds, but sound will only be triggered if users click on them.
The video ads, which are currently being tested, had been delayed because of engineering problems that made them slow to load.
The Wall Street Journal reported that the ads will play automatically in users' feeds regardless of whether users click on those ads.
Several advertisers said Facebook would start selling ads eventually for the holiday shopping season.
In August 2013, the social networking site planned to charge $2m per day to allow advertisers to reach Facebook users in the age group of 18 to 54.
During Q3, Facebook reported 60% rise in revenues, boosted by mobile advertising, but admitted to a drop in teen users thanks to other teen-focused social networks such as Snapchat.