This portion of script downscale your video to 4 video formats and create all the HLS playlist. Then you can host the files on your servers and use VideoJS, Shaka and others as a player.

ffmpeg-adaptive-hls.sh

OPT="-c:a aac -ar 48000 -c:v libx264 -profile:v main -preset veryfast -tune fastdecode -crf 21 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 6 -hls_playlist_type vod -hls_flags independent_segments -hls_segment_type mpegts -hls_list_size 0"

ffmpeg \
    -hide_banner -loglevel warning -stats \
    -threads 8 -hwaccel vdpau  \
    -y -i "$IFILE" \
    $OPT \
    -map 0:v:0 -map 0:a:0 -map 0:v:0 -map 0:a:0 -map 0:v:0 -map 0:a:0 -map 0:v:0 -map 0:a:0 \
    -filter:v:0 scale=w=640:h=360:force_original_aspect_ratio=decrease:force_divisible_by=2   -b:v:0  800k -maxrate:v:0 856k  -bufsize:v:0 1200k -b:a:0 96k  \
    -filter:v:1 scale=w=842:h=480:force_original_aspect_ratio=decrease:force_divisible_by=2   -b:v:1 1400k -maxrate:v:1 1498k -bufsize:v:1 2100k -b:a:1 128k \
    -filter:v:2 scale=w=1280:h=720:force_original_aspect_ratio=decrease:force_divisible_by=2  -b:v:2 2800k -maxrate:v:2 2996k -bufsize:v:2 4200k -b:a:2 128k \
    -filter:v:3 scale=w=1920:h=1080:force_original_aspect_ratio=decrease:force_divisible_by=2 -b:v:3 5000k -maxrate:v:3 5350k -bufsize:v:3 7500k -b:a:3 192k \
    -master_pl_name master.m3u8 \
    -var_stream_map "v:0,a:0,name:360p v:1,a:1,name:480p v:2,a:2,name:720p v:3,a:3,name:1080p" \
    -hls_segment_filename "%v/%03d.ts" "%v/index.m3u8"