There is nothing wrong with aspartame. It is one of the most thoroughly tested and studied food additives ever approved. It has been tested and found safe by more than 90 countries worldwide. Aspartame is not the cause of any of these diseases, and this video does not offer any evidence to the contrary, but simply baseless claims.

http://www.ncbi.nlm.nih.gov/pubmed/17828671
http://urbanlegends.about.com/library/blasp.htm
http://www.hc-sc.gc.ca/...edulcor/aspartame-eng.php
http://www.foodstandards.gov.au/...artameseptember203703.cfm
http://web.archive.org/...tures/1999/699_sugar.html
http://www.efsa.europa.eu/en/scdocs/doc/af100423.pdf
http://www.gao.gov/products/HRD-87-46