Hypothesis Testing #1 - Basics! (No maths!)
This is a great video for any student new to the concept of hypothesis testing. It really lays the foundation for all subsequent hypothesis testing.

Type I and Type II errors (AND STATISTICAL POWER!)
This is an additional video that will help you with the basic concepts. Consider watching this before the videos below.

Hypothesis Testing #2 - Testing for μ when σ is known.

Justin introduces two examples in order to explain the concept of conducting a formal hypothesis

Hypothesis Testing #3 - Testing for μ when σ is unknown.

Here we introduce the t-test as we cannot rely on the normal distribution for our test statistic.

Hypothesis testing #4 - Testing for the population proportion p (or π)

Here we assess how to conduct a hypothesis test with categorical data!

Hypothesis testing (BIG VIDEO) - This video comes from my series on statistical inference but covers (in detail) the whole gamut around hypothesis testing. Worth watching for advanced players.