The remote was lying around and I just pointed it at an ATmega on a small breadboard with this code when nobody was looking. I muted the TV briefly to check that it worked, and took the device home to make a transmit-only ATtiny version inside one of those promotional keychains that have a coin cell, button and LED. I didn’t bother with writing the program the “right” way (sleep mode and pin change interrupt, which would eliminate button contact problems and allow for more complex behavior like more buttons or multiple-press), the ATmega just plays the sequence on powerup.
The other option is to find the closest possible TV model online (not easy, wall-mounted TVs you can’t see from the back barely have any distinguishing features) and check if the listed remote code works. Or use an IR-enabled smartphone, the various apps cover most TV models.
We’re trans-friendly here, you can come out
Edit: I interpreted the two pics as a two-panel progression