Google Developers R Programming Video Lectures by Stephen Turner.
From the post:
Google Developers recognized that most developers learn R in bits and pieces, which can leave significant knowledge gaps. To help fill these gaps, they created a series of introductory R programming videos. These videos provide a solid foundation for programming tools, data manipulation, and functions in the R language and software. The series of short videos is organized into four subsections: intro to R, loading data and more data formats, data processing and writing functions. Start watching the YouTube playlist here, or watch an individual lecture below:
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Twenty-one (21) high quality lectures on R.
Don’t be frightened off by the number of videos! Just scanning their lengths, I have only found one that is over four (4) minutes, one that is over three (3) minutes but less than four and a number of them between two (2) and four (4) minutes.
They are short but should be sufficient to get you started with R.