I think it is unethical to take videos or pictures of other people without their consent - I'm not a vlogger but I don't take my own photos of others without their consent- other than as faces i n a crowd, say, a picture of a footy crowd or panoramic shot of a beach
Take and post on social media photos of yourselves, your companions who consented, your cabin, your meals, etc, taking the photos, videos doing in a way that doesnt impact on others -eg don't block the entrance to the dining room
I think any ship has the right t o ask people to stop filming it if is likely doing any of the above..