Mobile Live-Stream Testing 
This video demonstrates remote live-streaming using open source software and self-hosted services. This was my first attempt at doing so and the results are fairly rough as a result: the video suffers from fairly severe shaking as I walk through downtown Raleigh and the stream ends abruptly as my camera runs out of battery. The audio quality was actually better than I had expected, though a lavaliere microphone would probably improve the setup.
I should note that the video recording is not an accurate representation of what was see by stream viewers. I know the connection was lost at least once while I was in the hallway, but otherwise I had little insight into the actual stream performance.
Hardware 
Latitude 7230
The Dell Latitude 7230 is an IPx65 rated 2-in-1 laptop/tablet designed for use in outdoor environments. My machine is running Debian Linux and includes builtin mobile broadband, which is what enables me to stream from OBS to Owncast while exploring downtown Raleigh.
I have a lot to say about this and other devices that I use regularly and with bespoke configurations. At some point, I would like to create a Discourse category for discussing personal devices with an emphasis on adapting proprietary products to an open source ecosystem.
EOS R6 Mark II
https://www.usa.canon.com/shop/p/eos-r6-mark-ii
The second part of this setup is a Canon EOS R6 Mark II mirrorless camera. While the Latitude has builtin front and rear-facing cameras, the IPU6 interface created by Intel is not yet supported on Debian, though it is expected to be added in Kernel version 6.10:
As was previously mentioned, the video was very shaky while I was walking. This could be improved with a gimbal mount, though perhaps a smaller action camera with this feature built-in would be more convenient.
Unfortunately, both cases require a physical connection via USB from the camera to the computer. A workaround for this may be possible, but transmitting high quality video without a physical connection to then be live-streamed would be challenging even in a stationary configuration.
Social Media 
Part of the experiment was to promote the live-stream on ActivityPub through Mastodon, which was recently deployed and should be demoed on its own. Briefly, Owncast publishes an alert to ActivityPub when a stream goes live, and I boost these posts on Mastodon with my personal account. Since my account has followers on other Mastodon instances, the boosted posts are disseminated to those instances for a much wider reach - which will be more useful when streams last more than twenty minutes!
Raleigh
The Raleigh Summer Beats Festival is an all-day event on Fayetville Street in downtown Raleigh. My video certainly didn’t do the event justice, as I only briefly showed a few booths and part of one performance. I was primarily concerned with testing my streaming technology at the time. Once the basic stream is improved, more could be done to showcase the event over the technology, which would allow this platform to function similarly to a local radio station.