Can't avoid automatic stock recovery even after flasing TWRP.

Hello.

My phone is a SM-G903F with an android version of 6.0.1 and with an architecture of armeabi-v7a.

I have a problem because when I try to install the TWRP tar file (dl.twrp.me/s5neolte/) through ODIN it all goes perfectly well, I install it in the download mode and after installing it, it automatically resets but when I now open the recovery mode it goes in the stock recovery mode and not the TWRP recovery mode.

I basically follow exactly the instructions in this video youtube.com/watch?v=3-lwdZhdZWM but I always end up in the stock recovery mode.

Can anyone help me or suggest anything I can do?

Thank you very much,
Enrique

oplus 8.91 no power, charging but detect on pc after i done flasing

Hello guys..i really need help fir my oplus 8.91. It suddenly shutoff coz of lowbat and i try to turn it on it on and no charging so i tried to charge the battery to a universal charger.then i tryagain to power it on but still no power on but when i plug on pc its detected then i downloaded a firmware its goose perfectly but when its done flashing the phone wont power on.pls help i realy need to fix my phone..