Moments
zedstatistics - What are "moments" in statistics? An intuitive video!: Explains moments, mean, variance, skewness and kurtosis.
Limits
Epsilon-Delta definition of a limit: Simple explanation.
My own
A week in the life (Yasin Gamieldien): Video I made for George.
Concrete countertops
DIY Concrete Countertops: Home with Stefani.