Hi Al,
Welcome to AAC.
Do you have a question?
E

 

A picture of a breadboard with four solder joints doesn't tell us much.

 

Here is a GUESS, which is that we are shown the connection side of a diode bridge circuit attempt that does not function as intended. If both of these guesses are correct, then my engineering analysis provides three possible causes of the undesired function condition:
Possible Cause #1 At least one diode orientation is reversed from what it must be.
Possible Cause #2 The power connection is not made to the correct bridge points.
Possible Cause #3 One or more of the diodes is either shorted internally or open circuit internally

This evaluation is in spite of my poor mind-reading, thought perceiving skills.
Note that a supply such as this must include a transformer to provide a safe isolation from the mains voltages to avoid a possible shock hazard.

A note to the TS, which is that requests for assistance or advice work much better if put into a text form. I seldom follow links and never watch videos.
And the greater the details provided offer a better context for useful responses relative to the question.

 

Wait a minute, !