Facebook users consume 100 million hours of Facebook videos per day, matched by 500 million hours of Youtube videos watched each day. Does that mean people are watch law firms' videos?

That depends on the channel and the device.

Look Who’s Watching
For law firm videos, the video click through rate (or play rate) on mobile devices is miniscule compared to desktops and tablets even though YouTube's traffic is more than 50% mobile. When Custom Legal...