, Saunders is standing alone next to a punch bag.
And in the video, reportedly "circulated on WhatsApp", the WBO super-middleweight champion demonstrates a straight right hand followed by a left hook.
He accompanied the punches with the following message.
"I just wanted to make a little video for all you dads, husbands, if you've got girlfriends etc.
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Saunders recently had his trainer Ben Davison and stable-mate Josh Taylor kicked off a plane after calling Delta Airlines with a coronavirus warning.
An audio clip surfaced which appeared to reveal him laughing as he recalled ringing Delta Airlines to tell them a friend of his had COVID-19 and was preparing to board the flight.
In a separate clip, the raging trio tell Saunders: "Well done Billy Joe, your plan worked. We’re not on the flight now. We’re in serious trouble bruv. So thanks for that.
"Me, Ben and Josh pulled off the plane. We may be getting a 24-hour holding because they think we’ve got [coronavirus]."
The friend was tested and eventually allowed to fly home.
Saunders was due to fight Saul "Canelo" Alvarez on May 5 in Las Vegas, before all boxing events were KO'd by the coronavirus.
And that fight may now never happen at all after the fighter was suspended by the British Boxing Board of Control.
It is believed that Saunders could now face a ban of up to a year as punishment for the video.
Eddie Hearn and Billy Joe Saunders have £50k-plus bet on winner of Anthony Joshua vs Tyson Fury if title fight happens