NETIZENS using brief clips of footage from TV series to accompany comments will not be prosecuted, under refined proposals on copyright protection for the digital era.   A government source said the intention to introduce an amendment bill to the copyright law before the end of 2010 does not aim to target general netizens but to clamp down on large-scale copyright infringement.   But how long the clip is and whether it will affect the potential market of the original will also be considered to decide whether the person who uploaded the material is criminally liable.   “For example if a 40-second clip from a 40-part TV series were dubbed and used to express certain views, [the person] should not be criminally liable,” the source said.   On...