BBC Sport - How does the video assistant referee (VAR) work?

Watch: Referees' chief Riley explains how VAR works

Referees' chief Mike Riley explains how the video assistant referee (VAR) system works. It was first used in English club football in the Brighton-Crystal FA Cup third-round tie on 8 January.

READ MORE: VAR makes English club debut - but how does it work?

READ MORE: VAR to be used for FA Cup replays

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