Originally I had a (not much) shorter version of this as a comment on YouTube, but it was still pretty long for a YouTube comment, and I don't anyone wants to read a miniature essay as a YouTube comment, so I am posting my full critique here.
Something that It's Black Friday mentioned in her reaction video (::here::) is that there's quite a few styles that were left out - I would definitely say that 'CorpGoth' was one of them, and that the hippie/Goth hybrid also.
I think perhaps the styling errors were more about what was available at the making of the video than Liisa not knowing how to do it; perhaps this is another fault of following the format set by Buzzfeed. Liisa's a very knowledgeable person, and I really enjoyed 'Encyopedia Gothica'. Personally, I think it would have been better to find people who were willing to model for the video who wear each of the styles regularly rather than make-over one model, or at least find people from each sub-style to style her. The wigs didn't look right at several points. The V-fringe on the Romantic Goth one, for example, looked frizzy at the edges rather than crisp, and the Lolita wig looked VERY Hallow'en and not suitable for the fashion at all. However, I also know that good quality wigs are expensive.
I understood what was meant to be conveyed, but I just don't feel like the video fulfilled its brief, and that in places there were errors in the styling. The Romantic Goth, Pastel Goth and Steampunk styles were pretty accurate, and the 'Nu Goth' and 'Pin-Up' styles were very good representation of 'Strega' and 'Gothabilly/Psychobilly' even if misnamed, but I think it did also have its flaws.
The usual response to these sort of critiques is that I should do it myself if I think it's so wrong - firstly, I don't think it's awful by any means, and secondly, I am planning to do my own 40 years of Goth fashion, but to avoid the practical issues that come with trying to style a model, I will instead illustrate each style, and probably produce eventually a blog entry, and perhaps an infographic. I know the sub-styles have already been explored in illustration by Black Waterfall as the 'Goth (stereo)Types' ::here:: but I plan on both a more realistic and detailed illustration style, and adding more information both on history and on the fashion.
Obviously, to do the best possible version of this is, I am going to be doing a lot of research. I've been talking to a lot of Goths who have been around in the subculture longer than I have, looking through archives of photos from the scene (I recommend 'Some Wear Leather, Some Wear Lace' by Andi Harriman and Marloes Bontje, and the associated Tumblr ::NOWTHISISGOTHIC:: run by Marloes Bontje as a starting point).
I'd love to hear other people's responses to the video, and if Liisa Ladoceur's reading this, feel free to rebuff my critique! I'd love to discuss the history of Goth fashion in the comments, and I especially want to hear from '80s and '90s Goths who were actually there. If you think I'm wrong, feel free to correct me, too.
[edit: fixed for improper accreditation for NOWTHISISGOTHIC ]