Pinhole projection giving me nothing at all.
Last time I smoked glass black using a candle, sun was a dim yellow disk, we could see the black dot of Mercury on the face of the sun.
We did not stare, and the glass was very heavily smoked. Honestly, I don’t think there was danger, but no medical or astronomical authority endorses the method. Caution, good sense, at your own risk.
Looking at the online video, I can see why pinhole projection isn’t working. You can barely see a red dot on the orange sun.
I tried the pinhole projection technique in 2004 and 2012 for the transits of Venus with no luck...and Venus is much larger than Mercury (almost as large as Earth).