I mean, classic torrenting has no issue with user-friendliness, look at Popcorn-Time. It’s all about the app front-end, proper API to update trackers, and UX. Hell, you could enforce some balance or seed/leech by having a reward system for heavy seeders.

Note that I never used peertube, so it might just be exactly that…

Yup looking at the components around and the layout, it does look like a quartz crystal, especially considering it’s right next to the microcontroller, and the 2 beige components above are the matching capacitors.

But yeah I’ve never seen a package with an open window. Maybe it’s an ultra high precision that has been tuned with lasers (usually done for patch antennas).