Learning R for Statistics video series (27 introductory videos)
An introduction to Hadoop – 1 hour introductory video through O’Reilly
RHadoop – by RevolutionAnalytics
Big Data University – Practical Courses on Big Data introducing you to some of the software used
Hortonworks Sandbox – a pretty good way to learn Apache Hadoop and its associated tools including an Hadoop server, tutorials and example data (you should also get Oracle’s Virtual Machine to run the Sandbox).
CRAN links to R documentation and on line educational books