Intro to Buddhism (Hinayana, Mahayana & Tantrayana) Part 1/2

As always HH will give a short intro to Buddhism before the start of any of his teachings. This intro was given to students during the teaching of 'Heart Sutra & 37 Practices of a Bodhisattva', September 2010.
This intro HH talks about the importance of the Hinayana & Mahayana Buddhism in support of Tantrayana, as well as clearing doubts on the Vajrayana practices. Part 1 is general buddhism which will suit everyone.
Part 2 talks on the more advance buddhist topics such as Law of Causality & Dependent Origination, which may be suitable for more advance practitioners.