The biggest law firms in the US are increasingly posting videos on YouTube to promote their expertise, according to social-media research reported by the Law Society Gazette of England and Wales.

The research was carried out by Passle, a marketing platform for professional-services firms.

According to the Gazette, it shows that 144 of the top 200 firms in the US used the video platform. Personal-injury firm Morgan & Morgan was the most popular.

LinkedIn still dominates

Despite the YouTube growth, LinkedIn remains the social-media platform of choice for legal firms, with a combined following totalling more than three million.

The Gazette says that the top 200 firms also had a combined total of almost 733,000 Twitter followers.

According to the index, the average firm published 800 ‘thought leadership insights’ last year.

Adam Elgar, co-founder of Passle, said: “People buy expertise, but they also buy people. The savvy use of social media to share insights about both the law and the firm is a great way to sell yourself to potential clients, and it need not be a time-consuming exercise.”