It would look somewhat like this:
[link to the video would go here]
Title of Performance: (IE Breaking minds at the park)
Effects performed: (here you would name all effects done in the video)
Audience: (you could talk about the audience here - age, what they were doing before you went up and shoed them some magic)
The Performance: (here you would talk about what happened overall - how you approached, what you noticed during the performance; the good, the bad, things to work on, what you couldnt get your head around, spectator comments on certain effects/explainations, how you presented your effects in the performance etc)
Its like noting it down on a notebook, but sharing it with the community and evidence to back it up.