1,441 views

16:40 L

Watch
- Search Videos
  
  Advanced search »
- Submit a New Video
Discuss
About
- Try clicking on the various channels to see videos posted to that channel - if you're into music you can click the Music channel to get more music sifts - go on and explore! Use the "hotness" when you have opened the channel link to get videos that have gotten a lot of votes, or use "newness" to have a look at the new sifts.
  When browsing sifts you like, have a look at the Related Posts list to see other related videos, click the tags under the video title to see more sifts tagged with the same tags or have a look at other sifts from the same user in the More Posts By list. If the sifted video is in a play list, have a look at the play list to see other interesting videos the Sift users have linked together.
  Enter the Sift Lounge to chat with online sifters about anything and everything, or read interesting posts in the Sift Talk forum.
  The Top New Videos list is always full of interesting, current videos. It is always recommended that you have a look through the Top New Videos, but also have a look at these:
  - Upcoming Unsifted Videos - active video submissions that neither are published to the front page nor archived to the submitter's personal queue
- Have you seen a really funny, surprising, scary, interesting, cute or in any other way extra good quality video?
  Post and share it here - VideoSift is the best video aggregator on the Web, where we share, discuss, promote, and interact with the best videos out there on the web. Post it here, and share it with the large community of video-interested users. And - you are guaranteed to find more very good videos here already!
  Mind you, we only share videos you discover that someone else has made; if you "self link," by posting a video you have made, have posted or have interests in, you risk the ban hammer - read the posting guidelines before posting. The sift is NOT for promoting your own videos - it is for sharing videos others have made.
  Submit a Video Now »
Login

Luis von Ahn: Massive-scale online collaboration

submitted by my15minutes

1 decade 2 years 4 months 3 weeks ago

the first bit just covers how they went from captcha to recaptcha, and why, which most here already know. the second part uses those ideas to explain their new website - duolingo.com

7 Comments

1 more comment have been lost in the ether at this killed duplicate.

The last two minutes WILL BLOW YOUR MIND if you believe and wish for a more equal society and access to education.

>> ^bareboards2:

The last two minutes WILL BLOW YOUR MIND if you believe and wish for a more equal society and access to education.

Absolutely, although it looks like they only have 2 languages at this stage. I'll definitely be checking out the site as it progresses to see what other languages are added over time. One thing he didn't really answer was who benefits from the translation.

Moving this video to my15minutes's personal queue. It failed to receive enough votes to get sifted up to the front page within 2 days.

ant

jokingly says...

When will VS use it?

ant

It has *comedy parts too!

Adding video to channels (Comedy) - requested by ant.

Discuss...

🗨️ Emojis & HTML

Enable JavaScript to submit a comment.

This website uses cookies.

This website uses cookies to improve user experience. By using this website you consent to all cookies in accordance with our Privacy Policy.