When I try to playback mp4 or avi files and have a srt file with the same name in the same folder I get a dialogue
Select a resource to play
MPEG_PS_PAL
MPEG_PS_NTSC
Cancel
If I remove the srt file the video plays without any issues
VLC for iOS 2.4.1(1)
IPhone 5S
iOS 8.1.3
Synology NAS
Serviio 1.4.1.2-0026