The company you work for is not your friend. If it is their body can they will use it to their benefit. Any benefit you receive will be incidental or simply part if their propaganda to get you to wear it for them.
It will be used, primarily, to surveil employees. They will track your habits and ensure you are aware that every single thing you do for your shift is something your boss or their boss or their boss can come back to you with and reprimand you for. They will try to set performance targets that can be compared to your videos so they can tell you what an algorithm or a petty middle manager says you are doing wrong. Too much time helping a customer. You’re not folding clothes fast enough. Walk faster. No sitting. They will set keywords. Union. Break. Curse words. Your bosses’ names. They might not even review these things. The intimidation is enough. Maybe you’ll get new policies. See that black guy? Follow him. Get video. The algorithm said to do it so it can’t be racist. We’ll pass it along to the cops.
Companies wouldn’t pay for it if they didn’t see a business angle and the obvious ones are control over employees and being able to use more video for “liability” defense.