Your video shows everything about the VicTsing MM057 2.4G except the two buttons on the left side

page control if not stated in manual.

SAME THING! Don't tell me I don't need a manual (or, really a driver)! I want to reprogram the additional buttons and I cannot figure it out, now I know to stop looking

check the back of the circuit board on the press button is there a button to press on the back of the cct board ?

Take apart again, and clean all connectors and try again. Maybe some rust build up on connectors.

There is a great video of this out on you tube that shows you step by step how to remove everything.

Hello!

Pleack check the "Troubleshooting" part of the manual.
Hope it will help!
https://manualsbrain.com/en/manuals/992718/?page=62

Just figured this out !
1) You have to be in 'Standby' mode - press (SRC) until it shows standby.
2). Press and hold 'Menu' button.
3). Using the joystick - move it left or right until it shows 'AUX' 'OFF'.
4). Move joystick up or down until it shows 'AUX ON1'.

It should now work ! - This is on P.22 of the manual - but it actually starts on page 19 where it describes 'Standby' mode.

Unplugged it for an hour.... buttons changed.....Unplugged it for four hours and everything worked......Left it plugged in overnight and back to original problem....

the scroll button is already losing contact that why is not working properly..use a lighter fluid to the button then roll up and down untill the button is clean don't put to much fluid ok...

There is a plasic cover that goes over the gear behind the screen on the left side. Take a look at that, it might be jammed in the gear prventing it from open or close.