Using jellyfin but need help please

Using jellyfin_10.6.4_windows-x64

i been using Plex for several Years and i keep it as a backup Server
Now i am loving Jellyfin so much but i tan into an issues.

Please help me as,When i playback Movies from the Jellyfin Client all seems fine,but when i use the Emby Client i run into Playback errors
with avi mp4 files error using jellyfin server,However No Error using the Emby Server. and Emby Client together,

Is there a way i can fix that so i can stick with jellyfin? as the Server and Emby as the Client?

we do not support emby