Conclusion

Video Assistant Referee (VAR) is already in use across the majority of Europe major leagues this season, including Spanish Football League (La Liga), the Germany Football League (Bundesliga) and The Italy Football League (Serie A). 

While The English Premier League clubs voted in April to extend trials of the system rather than introducing it for the 2018-19 campaign.

The decision came after comprehensive discussions regarding the progress made in Video Assistant Referee (VAR) trials in English football and key learnings from the many competitions elsewhere using it.

The clubs also agreed the advanced of testing will continue to the end of season 2018-2019 to make further improvements to the system, especially around communication inside the stadium and for those following at home and around the world.

What we have learn that human error and subjectivity. Debate in football would not stop with the penalties which particular it still down to a referees and Video Assistant Referee (VAR) judgement.

Next, the replays that the Video Assistant Referee (VAR) and referees are encouraged to watch replays in real-time which is what Jones did on the Willian incident in the English Premier League but are permitted to use slow motion should they can wish a particularly with handball incidents.

Besides that, communication both referee and the Video Assistant Referee (VAR) can start a conversation. It is not a constant dialogue during a game, but there are regular exchanges.

Last but not least, the crowds which there remain issues about showings fans in the stadium what is going on. For example, if a footballer 'dive' was overturned and a penalty awarded, it is not yet clear how a referee would communicate that his yellow card for diving had been rescinded.