Thank you for refering this issue, MAMBOPOA,
I tried downloading the subtitles of https://amara.org/en/videos/xnBPhEByxPgO/info/captain-koons-by-piti-contest/ on my mother's iPad and encountered the same issue: the subtitles opened in the browser (safari in this case) instead of downloading.
Problem, as in your case: the browser used another encoding than UTF-8, hence the weird symbols replacing apostrophes. Do you know how to change browser encoding on an iPad? if yes, change it to UTF-8 before opening the subtitles, so that they appear correctly. Then select them all, copy them, paste them in a note, saving the note as UTF-8 encoded simple text file, but with the same extension you originally chose.
If you can't change browser's encoding, then maybe wait until you can use a PC or a Mac, download the subtitles there and then email them to yourself.
As it is, I downloaded your subtitles as .sbv (apparently, the format you wanted?) and .srt. I am attaching them here.
Note for me: subtitles download normally on my android phone.
I think you can use use a File Manager App Install a file manager app on your iPad, such as Documents by Readdle or FileBrowser, which allows you to download files from websites and manage them on your device. You can use the app's built-in web browser to navigate to the website where your subtitles are hosted, download them, and then access them within the file manager app.