So I tried updating BIOS, using everything said in the video, and then trying out different methods. It just does not recognize the file, which makes me think that my BIOS is not the same as the one from the download page even if it says it is. I'll have to call where I bought the PC from to see if they can find the correct model for me. But, I did manage to install Windows 11, so I might not even care about updating the BIOS at all since stuff works.
The funny thing with the Windows 11 installation is that in Windows Update it said that I didn't have TPM 2.0, which is also why a newer BIOS update could have fixed this problem. I then went into BIOS and enabled security, which surprise, surprise, turned on the TPM. Now, I still didn't have the correct TMP version according to Windows Update (TPM 1.3 or something like that) but when I used the Microsoft Health Check app it told me that everything was in order and that I HAD TPM 2.0.
So, either Windows Update or Microsoft Health Check is saying the wrong thing. So, since I could not install Windows 11 from Windows Update because it didn't recognize the newly enabled BIOS setting, I had to turn to Windows 11 Assistant for help, which updated my Win 10 to Win 11 without any problems.
Voilà, Windows 11!