i found your sources to be questionable at best, so i checked up on more reliable sources such as NASA itself...
"
Can this comet influence us from where it is, or where it will be in the future? Can this celestial object cause shifting of the tides or even tectonic plates here on Earth?There have been incorrect speculations on the Internet that alignments of comet Elenin with other celestial bodies could cause consequences for Earth and external forces could cause comet Elenin to come closer. "Any approximate alignments of comet Elenin with other celestial bodies are meaningless, and the comet will not encounter any dark bodies that could perturb its orbit, nor will it influence us in any way here on Earth," said Don Yeomans, a scientist at NASA JPL. "
source:
http://www.nasa.gov/topics/solarsystem/features/comet_elenin.htmlhttp://ssd.jpl.nasa.gov/sbdb.cgi?sstr=elenin;orb=1;cov=0;log=0;cad=0#orbalso the video you posted doesn't work, the account was banned for numerous copyright complaints. suspicious.