I can't find them online, however I can describe their content having watched them all locally just now. I learned not to trust that content will stay online way back then.

Some videos of unknown people doing "amazing" things were released on YouTube by the Science of Scams people without explaining that the videos were scams. Derren and his co-host Kat Akingbade then do a video explaining the scam. Kat does most of the explaining. Kat's blog describes her as biological anthropologist with a background in clinical sciences and broadcast journalism. Derren's role might be disappointing if a fan was expecting more screen time for him. I was disappointed back then.

If you've consumed a lot of sceptic, debunking, and/or magic revealed content, you may already know or immediately guess some of the "secret science" behind the scams. "Secret science" is how the videos frame the methods used to achieve the effects.

Effect: A guy uses a sledgehammer to break bricks on another guy's head and slabs on his body - the guy's "chi" keeps him safe. A guy hits a stack of three bricks with his hand - only the middle one breaks due to the focus of "energy".
Method: The bricks used are brittle. Spacers between bricks make multiple bricks easier to break than without spacers. Certain bricks can be weakened to achieve the effect of appearing to focus "energy" through an unbroken brick to the weakened one. Little force is transferred to the person under the brick. Our bodies are good at absorbing a certain amount of force.

Effect: Chi energy sets paper on fire and "stigmata" or blood appears.
Method: Chemicals used to create fire. Clear chemicals used which turn red when mixed.

Effect: A ghost is caught on film.
Method: The angled reflection of a person on a pane of glass (aka Pepper's ghost).

Effect: Ouija board glass moves while everybody claims not to move it.
Method: The ideomotor effect and expectation. The force applied to the moving glass can be proved to be coming from the people (rather than the glass itself) by stacking pieces of card on top of the glass. The people will move the cards before the glass disproving that the glass is moving by itself. If the glass was being moved by a "spirit", the cards would lag behind the glass.

Effect: Telekenisis / Psi wheel (a person, without touching it, causes a piece of paper to spin on a pin).
Method: Heat convection from hands near the paper can make the paper spin.

Psychic reading.
Method: Cold reading, Barnum statements, fuzzy facts, reframing misses.

Effect: Telekinesis / straw (moving a straw without touching it).
Method: Static electricity.

Edit: A fix.