Video ad startup ScanScout has announced a strategic investment from Time Warner (NYSE: TWX) through Time Warner Investments.  Financial terms were not disclosed. Time Warner Senior VP Rachel Lam, who will be joining ScanScout’s board, said the company intends to use ScanScout’s technology to take advantage of its growing array of online video content.  ScanScout had raised $7 million back in May from General Catalyst Partners to develop its contextual advertising technology and to expand its staff.  Release.