how to combine init.mp4 and seg-*.m4s files?

[yulsimi]

Hello

I'm trying to download a video from a streaming website
I've found out the video is segmented with MPEG-DASH format
so I could find .mpd fild, init.mp4 files for video and audio each, and seg-*.m4s files for video and audio each
How can I combine these files into the original video file?
I've downloaded all the segment m4s files with invidownloader but it doesn't help combining m4s files with init.mp4 file
what should I do?

[LZAA]

Need link.

[yulsimi]

@LZAA
you need to pay to view the video so I don't think the link to the video would help...
but here's the link anyway https://www.vlive.tv/video/102755
and here's the link to the mpd file https://aegis-naver.pstatic.net/globalv/owfs_rmc/read/global_v_2018_12_31_380/cenc/13a...7d5/stream.mpd

[LZAA]

Content encrypted: cens.

[Sviests]

Paid subscription sites are against the forum rules.