Some IPTV-providers cannot afford normal bandwith for all users, so VLC player should has native support of multi uploading HLS stream segments for each segment (better unlimited uploading threads for each segment) as multi-upload downloader apps do it. For smooth playing video.
VLC player has setting: VOD -> RTSP VoD -> Legacy RTSP VoD server -> Maximum number of connections (by default 0). It's only for RTSP or it's also suitable for HLS, DASH ?