Wikitongues has been on the go since 2012, but I heard about it just recently. It’s a project aimed at documenting linguistic diversity and exploring identity, in the form of short videos of people speaking different languages and dialects – about 50 at the time of writing.
Based in New York, the project is spread across social media websites: Facebook, Tumblr, Instagram, and YouTube, the last of which may be the easiest place to browse the videos. Speakers talk about themselves and their languages for 30 seconds to 18 minutes, though most videos are around 1–4 minutes long. A few have transcripts.