On most Amlogic devices you hold the recovery button, apply power, release after 2-3 seconds, then you see the LE boot splash once KERNEL has been booted. Some devices need 1 second, some 6-7 seconds. I've no idea what you box needs ![]()
Box vendors can add a custom boot splash to u-boot (although most do not because it requires effort) and to customise the Android boot splash (most do, because it's simple). I've no idea which one you see ![]()
If you box does anything different or needs some different process .. it's impossible to triage what's required without connecting a serial UART device to the board so we can see what happens or fails in the early boot process. That requires a) having a USB serial UART tool, and b) opening the box up to install it, which often requires wires or pins to be soldered to the board. Otherwise we are blind, and blind guesswork is a recipe for frustration not success.
The 'Android' and 'LOST.DIR' folders were created by Android during recovery boot, it's harmless.