Analysing Your Interviews
In this video, Dr John Shulz gives detailed comprehensive step by step guidance on how to analyse qualitative interviews. You can use this as an introduction, or revision.

How to Know You Are Coding Correctly: Qualitative Research Methods
This video has some useful tips on coding.

How to Code A Document and Create Themes
This video gives an example of coding a document.

Validity and Reliability in Qualitative Research (6 Strategies to Increase Validity)
In this video Dr Jurek Kriukow explains how reliability and validity are achieved in qualitative research. 

Inductive Analysis for Analyzing Data
This short video by Andrew Johnson simply explains the process of induction.

Critical Thinking - Fundamentals: Correlation And Causation
In this Wireless Philosophy video, Paul Henne explains the difference between correlation and causation.

Triangulation Of Evidence
Try watching this video for further explanation of triangulation of evidence.