You should avoid soldering when possible because connectors are detachable for module maintenance and solder is prone to cracking in high vibration environments. Typically you will see a connector soldered and otherwise secured mechanically to a PCB where vibrations are unavoidable.
Crimping is better whenever feasible
Most people following Instructables for tips on soldering wires to vector boards aren't likely to need to maintain their prototypes, and roughly 0% of those prototypes will be in a high-vibration environment.
Anyone who has debugged one of them knows to do things properly or suffer the wrath of intermittent problems.
For wires like the ones in the video you can still use something like a small phoenix connector and just screw your wire connections in, just like you would wire up a choc box, no crimp tools required.
The advice in the post will likely create a cold joint and intermittent/noisy connections.
I started out soldering but now it's mostly limited to installing connectors into PCBs followed by hot glue around the housing for mechanical rigidity
If you're an individual making runs of 1 and you have to crimp a different connector to a different wire every time, soldering is easier and more likely to result in a reliable connection.
For prototypes or one-offs, soldering as you say is more likely to be reliable.