Ok an update here, i don't want to make a new post, but this has to be mentioned, the gift that keeps on giving known as the ever awesome BarfQuestion has realeased Empire of Sock 3, stop all your plans and go watch it: http://www.newgrounds.com/portal/view/648036
If this is your first time encountering this awesomeness then go here to the official play list: http://www.newgrounds.com/playlists/view/1196945bfd3212007a84532aae34f726
And if you are already converted, the hell are you doing here!? you are missing on even more awesomeness back at Barf's blog! http://barfquestion.newgrounds.com/news/post/910477
Alragith back to the most helpful video on the internet, mostly because it is accessible to the general public. And talking about accesible thanks to Neverhundred here's an useful link with a list fallacies: http://www.informationisbeautiful.net/visualizations/rhetological-fallacies/
And here are the individual videos for easy use:
This one is actually a mixture of appealing to an inappropriate authority (someone has authority but in the wrong field), and inversed Authority Fallacy (what someone said is disregarded because that person has no authority, even if what it said was true, like for example it has the research at hand, even if the person itself was not involved in the research), now the actual Authority Fallacy: is saying that something is true because this person of authority in the actual field says so.
Now if you somehow ignore all he said just because of the end when he talks about gamergate, then that is an Ad Hominem Fallacy, as for the guy himself he is indulging in a fallacy of composition, he generalises a whole movement because parts of it (regardless of how big they may be) are toxic: http://en.wikipedia.org/wiki/Fallacy_of_composition. , however that doesn't means that he is against the ideals that gamergate protest against, like transparency on journalism or ending sexism, assuming that would be a Black & White fallacy.
I will update this post if more videos are made, like one for composition.
And here's a link with the rules for a critical discussion: http://en.wikipedia.org/wiki/Pragma-dialectics#Rules_for_a_critical_discussion