not recommended for rockchip socs since it cannot handle the rather high baud rate of 1.5Mbaud. Use FT232, CH340 or CP2104 instead.

I used a regular ch340, most likely a fake. Keep in mind that the baud rate is 1500000 in both u-boot and Linux.

Use the one that works / safe to ignore. I think one device is normal and the other for WiFi direct.

As highlighted by an issue on BTT's GitHub, why are two wireless interfaces present (wlan0 and wlan1)? What should we use ? armbian-config presents them both.

Hello all, Ok, I'm going to comment on my own question here... I just now installed the Armbian 25.8.0 6.18.0 RC5 xfce version. It's not yet on the nvme drive but, it's significant faster than the 25.5.1 version. Now HD video works on the 5b+. It needs 2 seconds to stabilize but than it is perfectly fine to watch. I use Firefox as my browser. So thanks to the team! Ernst-Jan