How fast does 5 knots look like on a river boat - with a YouTube clip to see the speed?

Five knots is roughly equivalent to 5.8 miles per hour (9.3 kilometers per hour), which is a moderate speed for a riverboat. At this speed, the boat will create some noticeable wake but will not be moving so fast that it becomes difficult to see the surroundings. For a visual representation, you can check out this YouTube clip: Boat Speed at 5 Knots.