Question: Who is both an Austrialian-born British independent filmaker and is known for his work  with the YouTube series THE PERIODIC TABLE OF VIDEOS?

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Chemical Galaxy is a new representation by Philip Stewart of the periodic system of the elements, better known in tabular form as the periodic table, based on the cyclical nature of characteristics of the chemical elements (which depend principally on the valence electrons).  Even before Dmitri Mendeleev produced the first satisfactory table, chemists were making spiral representations of the periodic system, and this has continued ever since, but these were usually circular in outline. Unbinilium, also known as eka-radium or simply element 120, is the hypothetical chemical element in the periodic table with symbol Ubn and atomic number 120.  "Unbinilium" and "Ubn" are the temporary systematic IUPAC name and symbol, until a permanent name is decided upon.  In the periodic table of the elements, it is expected to be an s-block element, an alkaline earth metal, and the second element in the eighth period.  It has attracted attention because of some predictions that it may be in the island of stability, although newer calculations expect the island to actually occur at a slightly lower atomic number, closer to copernicium and flerovium. The Periodic Table of Videos is a series of videos about chemical elements and the periodic table.  They are published on YouTube and produced by Brady Haran, a former BBC video journalist, featuring Sir Martyn Poliakoff ("The Professor"), Peter Licence, Stephen Liddle, Debbie Kays, Neil Barnes, Sam Tang and others at the University of Nottingham. An extended periodic table theorizes about elements beyond oganesson (beyond period 7, or row 7).  Currently seven periods in the periodic table of chemical elements are known and proven, culminating with atomic number 118, which completes the seventh row. Stephen T. Liddle is a professor of chemistry at the University of Manchester.  He is known for his work on the "The Periodic Table of Videos", a series of videos from the University of Nottingham presented on YouTube, which feature educational vignettes on the periodic table.  His laboratory research focuses on the chemical properties of lanthanides and actinides. Group 11, by modern IUPAC numbering, is a group of chemical elements in the periodic table, consisting of copper (Cu), silver (Ag), and gold (Au).  Roentgenium (Rg) is also placed in this group in the periodic table, although no chemical experiments have yet been carried out to confirm that it behaves like the heavier homologue to gold.  Group 11 is also known as the "coinage metals", due to their former usage.  They were most likely the first three elements discovered.  Copper, silver, and gold all occur naturally in elemental form. In chemistry, a group (also known as a family) is a column of elements in the periodic table of the chemical elements.  There are 18 numbered groups in the periodic table, and the f-block columns (between groups 3 and 4) are not numbered.  The elements in a group have similar physical or chemical characteristics of the outermost electron shells of their atoms (i.e., the same core charge), as most chemical properties are dominated by the orbital location of the outermost electron. Sir Martyn Poliakoff CBE CChem FRS FRSC FIChemE (born 16 December 1947) is a British chemist, working on gaining insights into fundamental chemistry, and on developing environmentally acceptable processes and materials.  The core themes of his work are supercritical fluids, infrared spectroscopy and lasers.  He is a research professor in chemistry at the University of Nottingham.  His group comprises several members of staff, postdoctoral research fellows, postgraduate students and overseas visitors.  As well as carrying out research at the University of Nottingham, he is a popular lecturer, teaching a number of modules including green chemistry.  He is also known for his leading role in "The Periodic Table of Videos". Brady John Haran ( , born 18 June 1976) is an Australian-born British independent filmmaker and video journalist who is known for his educational videos and documentary films produced for BBC News and also for his YouTube channels, the most notable being "Periodic Videos" and "Numberphile".  Haran is also the co-host of the "Hello Internet" podcast along with fellow YouTuber CGP Grey.  On August 22, 2017, Haran launched a new podcast called "The Unmade Podcast". Descriptive research is used to describe characteristics of a population or phenomenon being studied.  It does not answer questions about how/when/why the characteristics occurred.  Rather it addresses the "what" question (what are the characteristics of Minnesota state population or situation being studied?)  The characteristics used to describe the situation or population are usually some kind of categorical scheme also known as descriptive categories.  For example, the periodic table categorizes the elements.  Scientists use knowledge about the nature of electrons, protons and neutrons to devise this categorical scheme.  We now take for granted the periodic table, yet it took descriptive research to devise it.  Descriptive research generally precedes explanatory research.  For example, over time the periodic table’s description of the elements allowed scientists to explain chemical reaction and make sound prediction when elements were combined.

Supporting sentences:
 They are published on YouTube and produced by Brady Haran, a former BBC video journalist, featuring Sir Martyn Poliakoff ("The Professor"), Peter Licence, Stephen Liddle, Debbie Kays, Neil Barnes, Sam Tang and others at the University of Nottingham. Brady John Haran ( , born 18 June 1976) is an Australian-born British independent filmmaker and video journalist who is known for his educational videos and documentary films produced for BBC News and also for his YouTube channels, the most notable being "Periodic Videos" and "Numberphile".