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On mobile,

The email modal is over most of screen and can't be closed...

Seconded. It's super annoying and while it can be worked around, I don't like having to deal with it following me around as I scroll.
Really sorry about that. I pushed a change to hide it when it doesn't fit.

That area of the screen is supposed to be an informational card, like you see in Google search results. When I have the data, it shows books a speaker has written, and I'm working on getting more in there.

Interesting project, but as op said email modal on mobile can't be navigated out of.
Sorry about that, it should be fixed now.
I tried to look for some math topics, such as "harmonic analysis", "lie algebras" and "model theory" - unfortunately none of the matches were relevant for any of the queries
Thanks, I'll look at adding some math classes.
Looks interesting. As someone going through all of Dr Jordan Peterson's lectures, I put him in the search and only one of his talks (with Joe Rogan) came up. Please add his stuff if you get the chance (he has a YT channel). It'd also be nice to be able to find like-minded talks.

Also, when pressing the back button through some searches, the URL changed with me but the results stayed the same.

The idea is really good, but there is still a long way to go.

Searching for "python simulation" (a suggested search, btw) yields results such as "introduction to programming lecture 23" - short of watching the lecture, how am I supposed to judge it's relevancy? There is no description, and the title contains neither "python" nor "simulation".

Also, the email sign up modal is enough to not make you want to return.

Thanks for the feedback. The email thing should be better now.

Agree on the relevancy issue, I'm working on ways to improve that. If you do a search that matches the closed captions, it will tell you where in the video the match starts.

Good initiative. Suggestion: The content could be categorized.For example - the lecture of MOOCs should be at one place.

Problem: Say, I am browsing page 5 for some query and I change the query, it shows page 5 of the current query rather than page 1 and if the content of current query is not enough to reach page 5, it shows "No results found, sorry!".

Nice! That's going to be very useful when learning a new topic/technology

How are the hits ranked? I imagine just time? Do you have a list of all sources you used?

There are about 20 factors right now, which I've been tuning over time. They are applied as I'm able to get the data for the talk. Here is a selection-

1. Is the publisher of the talk good? (whitelist)

2. Is the talk referenced in social media (e.g. HN)

3. Safe for work (i.e. you could use in a lunch and learn)

4. Length (15-50 minutes preferred)

5. Is the speaker a keynote level speaker?

6. Are there closed captions? Can the video be embedded?

7. How often does the speaker say 'um' (or similar)

8. Is the talk in English (there are some in Russian and Arabic, but only small collections)

9. Are there notable audio quality issues (channel balance)

10. If it's a historic talk, older talks get higher ranking

11. If it's a technical talk, these get lower ranking, unless you filter to that

12. Is the speaker influential enough to have a wikipedia article?

13. Has the speaker written books?

14. What is the role of the institution that sponsored the talk (conferences are neutral, think tanks, etc lose some ranking)

It shows ApplicationError. Got a HN hug of death, or are you updating?
Sorry, looks like a memory issue on the Solr server. I shut everything else down, so hopefully it holds!
Great resource but your filtering needs some serious work. I managed to filter myself into a corner with no way to get back.
Thanks for the feedback - I'll look into fixing that.
As someone who does a lot of learning online, I can see the usefulness of this! It'd be a lot easier for me to use if the filters on the side of the screen if they matched my search queries more closely. Currently, searching for "react.js vs. angular.js" leads to Ronald Reagan and Bill Clinton being options in the "speaker"filter.
Thanks! I think you'll get a better experience if you filter to "Technology" first, if you're using it that way. I'd like that to be more seamless, but haven't found a good way yet.
Great project Gary. Thanks for sharing (and building). I would love to see this kind of content get some love.
Thanks! I'm getting a ton of good feedback and lots of speaker recommendations, so the next version should be even better!
Just curious, is this using React/Searchkit/Elasticsearch under the hood?
It's a custom React UI + Semantic UI + D3 + Solr. If I had found Searchkit when I started this a year and a half ago, I would have used it!
Great project, thank you for your time!

(minor bug: Searching for "top 20%" results in "URIError: URI malformed /public/lecture_search.bundle.js?v=1.0.22:79346")

this is awesome. thanks!!

obviously a huge undertaking probably not in your wheelhouse- but finding a way to map all these topics together would be amazing.

I think a language filter would still be good.
Hey this is pretty cool! I looked for a specific CS topic and the result was definitely better than Google's. I'll probably keep using this!