Plex doesn't find .avi file

Hi
I’ve just added a tv show named Wilder but the plex doesn’t recognize the movie files…

Here is the ocmplete mediainfo of the first episode… Does anyone know why plex can’t recognize this one? I have also other movies in avi an there isn’t a problem with them…

Thanks

Complete name : Folge 1 - Knochen.avi
Format : AVI
Format/Info : Audio Video Interleave
Format profile : OpenDML
File size : 1.43 GiB
Duration : 55 min 48 s
Overall bit rate : 3 678 kb/s
Writing application : Lavf57.83.100

Video
ID : 0
Format : MPEG-4 Visual
Format profile : Simple@L1
Format settings, BVOP : No
Format settings, QPel : No
Format settings, GMC : No warppoints
Format settings, Matrix : Default (H.263)
Codec ID : FMP4
Duration : 55 min 48 s
Bit rate : 3 474 kb/s
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate : 25.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.151
Stream size : 1.35 GiB (94%)
Writing library : Lavc57.107.100

Audio
ID : 1
Format : AC-3
Format/Info : Audio Coding 3
Codec ID : 2000
Duration : 55 min 48 s
Bit rate mode : Constant
Bit rate : 192 kb/s
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 kHz
Frame rate : 31.250 FPS (1536 SPF)
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 76.6 MiB (5%)
Alignment : Aligned on interleaves
Interleave, duration : 32 ms (0.80 video frame)
Interleave, preload duration : 64 ms
Service kind : Complete Main

It is not the .avi file format, it is your file name.
If you want a series in plex (and you want Plex to recognise it as a real series )
you need to follow a certain convention to name and organise your files.
https://support.plex.tv/hc/en-us/articles/200220687-Naming-Series-Season-Based-TV-Shows

some more detail in german:

Oh man stupid me… thank you