Those specific films may be unavailable, or they may be in an old (AH1) format. To check, you can email the site administrator -- Hammer. If his email link isnt there, you could also try to reach him at
Hammer@flyaceshigh.com since he is a trainer.
Another good source of P38 films is the film library of the 479th Fighter Squadron (the aces high version, not the real squadron!) Those guys ahve been around since airwarrior. and their film library has some gems too.
linky Silat and Murdr are AH trainers with simply massive P-38 stick time. Widewing can tell you a ton about flying jsut about any plane, and knows off the top of his head whether the P-38J with 50% fuel can outrun a C205 at 12K altitude, for example.......
Lastly, consider flying with either the 479th or the 80th FS in AH. Those guys are committed P38 fanatics, are (pretty much) all nice guys, and are enthusiastic about spreading their addiction to the twin booms.