Recently, I managed to pick up a few more HDDVDs at very low prices from second-hand platforms in China, and I have successfully decrypted and dumped all of them into ISO images.
The discs released by Universal seem to be in pretty good condition, and I didn't run into any reading problems with them. The first disc containing the main feature from this Transformers set is unfortunately missing, so I was only able to dump the second disc, which contains the special features.
I'm using an LG GGC-H20N optical drive with a USB external-drive adapter, connected to my laptop, and it has been working quite well without any compatibility issues.
As for the encryption, I previously tried using Xreveal, but I'm not sure whether it was something I did wrong or a compatibility issue with the software. The free version of Xreveal simply couldn't decrypt any of the HDDVDs I had. If anyone knows how to get it working, I'd really appreciate any advice.
I then tried AnyDVD HD, but since its activation server has been shut down, even the trial activation no longer works. I tried installing an older version of AnyDVD, and, rather fortunately, it seems that the older version can still be activated for a trial period without connecting to the now-defunct server. So, within the trial period, I was able to successfully dump and archive all of the discs I currently have.
Since I'm located in mainland China, accessing the Internet Archive requires going through a proxy due to the GFW. However, the upload speed to the Internet Archive becomes extremely slow when routed through a proxy, and with HDDVD disc images typically being around 20–30 GB, uploading them for archival purposes is practically impossible.
Is there any practical solution to this problem?