Personally I don't think there's a problem with making a video while helping a person, but this comes with a lot of clause... The motive for the video, the vulnerability of the person and all.. because a person who is desperate for help shouldn't be exploited, but if the video is to create awareness then it's fine... On the other hand, I would never make a video of me helping a person, no matter the reason because I've always had a believe that good rewards comes from God, and when I start to seek human validity, I might not receive the rewards.