[apsurd]

I think your video explains it better than the text you have here. This is a very useful thing imo. I don't know if you intend to monetize this but I hope you consider that this would be great for high school and college students to learn about careers.

Building up your video base would be key here. So I'd build a framework that people can follow to upload their job. Make it ridiculously easy for people to post videos for their job and I'm sure people will be interested in helping out. Especially if you take the "stackoverflow" approach and use a creative commons license so everyone benefits from everyone else's work.

As for searching and filtering, you can start with something like sphinxsearch.com, and scale up to lucene, or if you have a budget indextank.com is worth a look.

IMO you need the data before you can worry about how good your search is. You can omit search entirely by just showing "recommend tags" and have people browse that way. Also you can/should implement voting so that the best vids for the best/popular jobs will bubble up to the top.

Please email me (in my profile) if you'd like some help with this - i think this would be a great asset to young people.