For better understanding it is suggested that you start watching from the first video in the playlist and move forward sequentially.
RStudio (1): How to install R Console and R Studio
RStudio (2): Variable specification and data operators
RStudio (3): Data Types (Vector, List, Array, Matrix, Factor, Data Frame)
RStudio (4): Common functions in R (If else, for loop & while loop)
RStudio (5): Basic plots in R (line, scatter, histogram, box, matrix plots)
Data Envelopment Analysis in R (VRS, CRS & Bootstrapping)