Add 2024 Conference Videos and Flickr photos to Conf. website

We have a list of the videos from the GraphQL Conference as well as the photos from the event 🎉

It looks like the videos get populated on the conf website from the _videos.ts file but it's not clear to me how those are getting pulled. I have all the video links, which are on a new YT channel.

@dimaMachina or @YassinEldeeb can either of you assist?