Hello experts!

i have a TP-Link WDR4300 wireless router. after a bad firmware flash the router is now completely bricked. i have tried following an awesome youtube video in order to unbrick it make by richard Lloyd
(youtube url + /watch?v=1hWT35w6sVI&list=WL&index=89&t=6s)
in my case, after i turn on the router and release the reset button, i see the router trying to download the recovery file, i see a progress bar comng up for 1-2 seconds...but thats it...nothing happens!
does any know what am i missing?
is there a specific firmware version i need to perform this with?