Xiaomi Mi Router 4A Gigabit Edition (R4AG/R4A Gigabit) -- fully supported and flashable with OpenWRTInvasion

I think I've bricked my 4A 100M :cry:

I'm trying the unbrick found at the end in this video, but it doesn't work for me.
I've followed all the steps (configure wired network on laptop as and and no gateway, connect the eth cable to first right port (no WAN) looking from behind, press reset and the power cord until yellow flashes).

Since I have 4A non-gigabit I've downloaded the firmware from miwifi and placed in the same folder as Tiny PXE Server and selected before pressing online.

After some time the yellow flash light turn in blue and flashing faster.
I left the router more than 10 minutes, but after, when reconnecting normally, the yellow light flash very slow and it's not seen from the computer (I've removed the fixed IP, but tried also with it).

What else I can do?