The torrent’s piece length is 4096KiB.
If we call the first piece 0, then piece 913 comprise
last 58KiB of VTS_05_1.VOB plus first 4038KiB of VTS_01_1.VOB.idx.
That’s the missing piece.
Rest of .idx file is in piece 914, which you have.
I believe benduwan has the .idx file, else you wouldn’t have 914.

I suspect the .idx file was created by Avidemux.
If so, then it would contain a folder name of the person who wrote it.
That folder won’t be easy to guess.
The .idx file is ASCII text, with very long lines.
Microsoft Notepad might not open it, but WordPad should do.
If benduwan could copy/paste the first three lines here . . .