trp said:

I don't know if it's because they're mts or the bit rates on some of them are high or what but on both THX trailers and a couple of the others, the video is only becoming viewable about half way in.

When I play them onto my PC with Media Player Classic, they start some seconds after I opened the files, but from the beginning; if I use VLC, they start almost immediately, but the audio is from the beginning, while video become visible after 8-10 seconds... the same for all my m2ts file - I'm sure it's not because the filetype, but because the m2ts file I use are AVC - H.264, "heavy" codec for oldest computers...

Your call but I would be inclined to just include official trailers and add your preferred test trailer at the start/end.

I think to add them in a proper section, "unofficial", along with the Star Wars one, after all the others... I also thought to start a thread, "post your unofficial/custom made DD DTS THX trailer"... what do you think?

Another unaccounted for trailer (and it's very doubtful you'll get it) is the DTS water drop trailer. Apparently it's very similar to Imagine Films' intro logo, and they took issue with it resulting in DTS pulling the trailer. Instead we got the Sonic Landscape trailer.

I'm aware of it, and also asked a person to scan the actual film print... still waiting his anwer...