This tool will allow you to download the entire playlist of a given m3u8 URL and merge into a single .ts file.

m3u8 URLS must return a playlist as a response, you'll know this if the m3u8 url has a response that looks like the example below

Example of Twitch:

Go to a Twitch stream profile
Go to the Popular clips section
(In chrome) Open your developer tools (F12 on windows)
Go to the Network tab
filter by "m3u8"
Search through the filtered requests until you find one whose Preview tab shows a list of .ts files

Example of a valid response:

#EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:18
#ID3-EQUIV-TDTG:2019-09-22T17:17:40
#EXT-X-PLAYLIST-TYPE:EVENT
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-TWITCH-ELAPSED-SECS:0.000
#EXT-X-TWITCH-TOTAL-SECS:18.0
#EXTINF:5.000,
485118384v0-517.ts
#EXT-X-DISCONTINUITY
#EXTINF:12.500,
518.ts
#EXT-X-DISCONTINUITY
#EXTINF:0.500,
485118384v2-519.ts
#EXT-X-ENDLIST

requires python 3.8.x

Assuming you've already installed python 3.8.x, make sure to install ffmpeg first pip install ffmpeg (you can use powershell or cmd)

Download this repo
Right-click dl.py > Properties
General Tab > Change
Select Python 3.8.x
Click Apply
Click OK
Double click dl.py

#install virtualenv
pip install virtualenv

#create virtualenv
python -m virtualenv .

#activate the virtualenv
.\scripts\activate

#install reqs
pip install -r requirements.txt

#run dl
python .\dl.py

#paste your m3u8 file in the url text box and hit download!