Configure a video stub for expired users (7.1.4)

- Create a folder "errors"
- Put there "expired.m3u" file with a content:

#EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:10
#EXT-X-MEDIA-SEQUENCE:1
#EXTINF:4.0,
/errors/expired_01.ts
#EXTINF:4.0,
/errors/expired_02.ts
#EXTINF:4.0,
/errors/expired_03.ts
#EXTINF:4.0,
/errors/expired_04.ts
#EXT-X-ENDLIST

Put video segments along with m3u file.
Segment names have to be exactly as you put in m3u file.