Serviio

According to the release notes 8 digit imdb ids are supported as of 2.2. Howver, they are not working in 2.2.1
See logs below:

2022-07-25T15:47:14,870 INFO [MediaServer] ------------------------------------------------------------------------
2022-07-25T15:47:14,890 INFO [MediaServer] Serviio DLNA media streaming server v 2.2.1 (rev. 7dfe9e60ec4aa7e219630fa16aecf232e8b7bef0)
2022-07-25T15:47:14,890 INFO [MediaServer] Petr Nejedly 2009-2018
2022-07-25T15:47:14,890 INFO [MediaServer] http://www.serviio.org
2022-07-25T15:47:14,890 INFO [MediaServer]
2022-07-25T15:47:14,890 INFO [MediaServer] Java 1.8.0_242-BellSoft x86
2022-07-25T15:47:14,890 INFO [MediaServer] OS Windows 10 10.0
2022-07-25T15:47:14,891 INFO [MediaServer] File encoding: windows-1252
2022-07-25T15:47:14,891 INFO [MediaServer] Headless mode enabled: true
2022-07-25T15:47:14,892 INFO [MediaServer] User: LAPTOP-EU93DHJU$
2022-07-25T15:47:14,892 INFO [MediaServer] User home dir: C:\WINDOWS\system32\config\systemprofile
2022-07-25T15:47:14,892 INFO [MediaServer] Temp dir: C:\WINDOWS\TEMP\
2022-07-25T15:47:14,892 INFO [MediaServer] ------------------------------------------------------------------------


2022-07-25T15:49:43,589 WARN [VideoMetadata] Invalid format for IMDB: 'tt15310668'. Ignoring it for file 'null'
2022-07-25T15:50:05,250 WARN [VideoMetadata] Invalid format for IMDB: 'tt15463260'. Ignoring it for file 'null'

I just checked the Bitbucket repository for that issue, and the developer does show it fixed as of version 2.2. I rarely need to use TT numbers, so haven't seen that issue.

If you don't use the TT number, and instead name the file (using your first example) "7 Days 6 Nights (2022)" is it identified correctly?

Your second example (A Night in the Academy Museum) isn't listed in themoviedb.org, so there's no way to gather online metadata. Using the IMDB TT number improves accuracy when matching the title, but the title has to be listed in themoviedb, as that's the sole source Serviio uses for online metadata.

Whenever you have issues matching the media title with the metadata, you must always verify the title is contained in themoviedb.org. If it's not there, you can't get online metadata.