I've made a site which lists all WWDC talks since 2000.

It doesn't host the videos, but has some details for all the sessions, organised per year.
I find it very useful to get an overview of a technology, to figure out which year introduced some new feature.

All the data on this site is also available as a single JSON file.

https://nonstrict.eu/wwdcindex/

WWDC Index

Unofficial index of WWDC sessions.

WWDC Index

If you do have access to your own video files, there's a video player that you can configure with some parameters.

Tip: Use CMD+F on the “All" page to search all of WWDC history.

https://nonstrict.eu/wwdcindex/all/

A lot of WWDC talks are no longer shown on Apple's website, but the video files still exist on the CDN.
In WWDC Index, you can configure $streamUrl in the video player to play those files.

If you want to download the available talks (before they are taken offline), I recommend this excellent gist with download scripts: http://gist.github.com/IsaacXen/874c59aec92a13f30728aecdabb9ea80

Once you have the files locally, you can use $videoAlmostEvery in the WWDC Index video player to use the filename from those download scripts.

It turns out every talk from 2011 and later is still available for streaming from Apple!
I've updated the WWDC Index site with links to the stream URL for talks that are no longer available in the Apple Developer app.
Here's an graph of all the sessions per year, showing how many are available in the Developer app.
Also updated the session pages on WWDC Index with links to the video files for downloading, as well as the presentation slides. All data is also available in JSON format for programatic processing.
https://nonstrict.eu/wwdcindex/
WWDC Index

Unofficial index of WWDC sessions.

WWDC Index

All WWDC sessions since 2011 are available for public streaming from Apple. Some sessions from 2007, 2008, 2009 can be viewed after logging in with a Developer account.

This graph shows how many WWDC sessions are still in the Developer app, available for streaming, require a download, or are not available from Apple.

For an overview of all WWDC sessions, see https://nonstrict.eu/wwdcindex/

WWDC Index

Unofficial index of WWDC sessions.

WWDC Index

Apple has uploaded a new batch of videos from last years' WWDC to YouTube. Now that most videos from 2023 are on YouTube, I've added a YouTube embed in WWDC Index.

So now you can watch videos directly inside the website. But of course you can still customize the inline video player to point to your own source of videos, for older videos.

https://nonstrict.eu/wwdcindex/

WWDC Index

Unofficial index of WWDC sessions.

WWDC Index
I’ve added speaker names to WWDC Index.
If you’ve ever spoken at WWDC in the past 25 years, and want to find back that one session: ⌘+F on the “All” page.
https://nonstrict.eu/wwdcindex/all/
All of WWDC

Unofficial index of WWDC sessions.

WWDC Index