Does Flare allow background play (listening while the phone is locked)?
Thanks for hosting ... posted your video to flare.pub as well: https://www.flare.pub/w/naddr1qqr4sd20dscyucgzyzmuda53tnaf5chl76slqfsym6yvy0rvd3k3hrmzclxpqaylxplgzqcyqqqgtwck3074u
Discussion
It doesn't have a native app - it's just a web page. If the browser supports it, background playback might work. Alternatively you can try zap.stream/videos which shows them as well (in a different player).
You can use the Zapstream PWA. It plays on my phone with the screen locked. Zapstream is using the same event as flare. Hence the content from flare displays on zapstream and vice versa.