It can support vertical and short length videos, but doesn’t really treat them much differently than other videos. Jared White did this shorts style test almost a year ago https://makertube.net/w/9v73BrPNvW7wYqRJLVbPkw . While Loops is more designed for that format, Peertube can definitely support them too.
Hopefully more projects take advantage of vulnerability scanning and monitoring tools like those in this OWASP list https://owasp.org/www-community/Free_for_Open_Source_Application_Security_Tools, have good code quality standards to make their projects easier to understand and evaluate, contribute and respond to CVE reports, and get third party security auditing.
All of that is hard to motivated those throwing their code out to the world only to share how they scratched their itch to perform. I think we need a combination of governments and non-profits providing incentives / grants to projects doing good practices, document and provide trusted a forum to validate vulnerabilities, give some backing to “trusted” frameworks, and provide some vulnerability and auditing themselves.
The recent EU push into more government open source usage will help as they will be more incentivized to secure the pipelines and everyone will benefit the fruits of that firehose of funding.