Looked at your first youtube vid and the comment says you used psardumper. Why?
You don't need 6.61, it was only a store update no games need it.
Install either 6.60 PRO-C fix3 or 6.60 LME 2.3. The latter is recommended if you want to try the TEST Oblivion Beta dumps (including hacks) as you need the extra ram enabled.
You don't need to use perma CFW, lite aka temp is fine and actually safer.
For PSX on PSP stick to official PSOne Classic releases when possible.
If you use a pre-made PSX2PSP conversion it may or may not have audio working properly, some old conversions used a bad PSX dump as a source so some audio is missing.
Create a new conversion using PSX2PSP v1.4.2 if you need to.
https://www.epforums.org/showthread....boot-w-psx2psp
Also use CDDA Enabler v2 plugin, but this will not fix missing audio if the PSX2PSP conversion used a bad dump as a source.
https://www.epforums.org/showthread....bler-v2-plugin
