For older movies, Youtube often seemed the best source. It's frustrating searching through the crap, but using Greasemonkey scripts to identify and highlight the HD versions makes it a lot easier.
Which script? Youtube enables you to filter using the 'Search options' under the main search box but not to change the defaults. I appended "&search_duration=short&high_definition=1" to my Web Search Pro URL for Youtube to get
http://www.youtube.com/results?sourceid=captaincaveman&aq=f&search_query="{searchTerms}"+trailer&search_duration=short&high_definition=1
which works.
The crap to gems ratio does seem to be increasing, moreso for new movies, I'd imagine. I just did a search for "Scott Pilgrim vs. the World" trailer (looks like a crap movie, but a very distinctive title that shouldn't turn up many irrelevant results), filtered it by 'HD' and 'Short (~4 mins.)', and found there were still 534 results! Clearly some users aren't checking to see if a video exists before uploading it themselves. Then there's:
- videos where the word trailer doesn't appear anywhere (even when +trailer is used)
- reviews of the trailer
- audio commentaries on the trailer
- spoofs of the trailer
- a "mashup" with the The Matrix trailer called "Scott Pilgrim vs. The Matrix"
- video blogs where, in the course of describing their day, someone says "So I was watching the scott pilgrim vs. the world trailer..."
- the trailer with foreign-language voiceovers
- videos of a different topic that use the soundtrack from the trailer
- videos that claim to be the "original" trailer. (Accept no imitations! Comes from a time long before Trailer#3 when people still took pride in their work.)
- fan-made "trailers" that contain no actual footage from the movie
- "Scott Pilgrim vs The World - NEW Official Trailer" (Others number the trailers but this guy trumps them because his is always NEW)
- a "trailer" that's actually a "behind the scenes" video posted by someone whose description is in Russian and probably doesn't know the difference
- trailers for the video game based on the movie
- spam telling you where to download the full movie for free
- the whole movie posted in 7 different parts
- a video that claims to be a "Teaser Trailer," followed by a "Release Trailer"
- "TV Spot #5" which is presumably a condensed version of the trailer (See all 5 to see all the ways the trailer was edited down!)
- the trailer playing on a TV filmed through a shaky cell phone camera (yet HD!) in a noisy environment (No one informs them that a real HD version of the trailer has come out.).
Google has some good options for their
Advanced Video Search like the -site:youtube.com feature you mentioned. You can also limit the Duration to videos < 4 mins., the Quality to High, and the Language to English (or whatever language you're expecting, although occasionally a foreign-language dubbed trailer is all that's available).
But it looks like
VideoSurf (in add-on form
here, and add-able to Web Search Pro
here) can do almost everything Google can do and some things it can't. They have:
- Visual Summaries: Thumbnail frames from the video. Hover over them and they appear in the large main thumbnail. Click 'Show Faces' and only faces are shown so that you can identify who's in the video. Click them and with some videos you can start playing right from that point (If not, the times of the thumbnails are listed, so you can drag the slider to them). This is particularly nice to help keep from getting Rick-Rolled or to spot videos that are actually songs (all the thumbnails will usually be identical).
- Refine Results by Person: People known to the Videosurf database that are recognized in the videos appear in the upper left of the page in thumbnail form and you can click on them to narrow down the search results to videos containing them (like if you know that a certain actor is in a movie).
VideoSurf doesn't have a "High Quality" option like Google Videos, but a Google Videos search using High Quality turned up a trailer on Hulu that wasn't HD as the first result. (Adding "HD" to the search terms didn't help at either site.) Videosurf actually has a "Trailers" filter that narrowed down the search from 3442 results to 9. Or a "Professional Sites" filter that took it down to
30. Another very useful thing is it automatically groups duplicate videos into one search result, so you won't be clicking on the same irrelevant video more than once in the results (unless someone has made token changes like inserting an advertisement, but you've still got the thumbnails to go by).