So if you watched Soi Nana on youtube you wouldnt go?
Someone in Glasgow or Wellington would benefit from a video on somewhere overseas they havent been.
If you never been to Peru or Chile a video or 2 would help to decide where to go.
No, but you can do research on temples, beaches, restaurants, tours etc to save time. A youtube video on a temple or a river trip gives you an idea.
You dont buy a computer without researching it. Why spend a week doing a trip without researching it?