viu.tv video download

[ewango]

First, the link to video:
https://viu.tv/encore/captain-tsubasa-season-2-jr-youth-arc

In Hong Kong, viu.tv and viu.com are 2 different websites, so when I searched in this forum with "viu", info came out is kind of mixed, and maybe because of this, I got confused at some point.
Outside of HK, you need VPN to watch the videos
Only the newest episode of the series if not logged in (a free account registered by email).
So by the time a kind soul passes by, you may find my link unavailable.

Another possible problem is the multi-track for the anime.
Both cantonese and japanese tracks are desired to be downloaded as separated tracks.

What I did:
I tried to follow this video
https://drive.google.com/file/d/1bD53mvG4Nes6-exxGvWiILabm_FZrlGr/view

The approach requires
1. yt-dlp.exe to get the encrypted video and audio, which I believe I did, with
yt-dlp.exe --allow-u -f bv,ba "{URL}"
where URL is the manifest.mpd URL I copied from the browser's dev tool Network tab, which seems to change from time to time when I test

2. key to decrypt the above downloaded files
which I struggled and failed

I tried to use this website for the keys
http://108.181.133.95:8080/

But I have no clue on how to fill in the info required.
Just all of them. I have no confidence that I have found any of them correctly filled.

3. if I have the kid(s) and key(s), I should be able to use
mp4decrypt.exe --key {kid:key} source.m4a dec_source.m4a
and so on for video or multiple audio

4. combine video and audio with ffmpeg, which I have experience and am capable of.

Any help is appreciated.

[2nHxWW6GkN1l916N3ayz8HQoi]

N_m3u8DL-RE "https://ewcdn109.nowe.com/session/p8-5-6726271a-a7555f9adbd24c48a9/Content/DASH_VOS3/VOD/2751/14390/a75651d5-5b08-40d6-afed-0714c7760e17/eda1eacc-f82d-4de7-d7b0-55bb2e3e927c/manifest.mpd" --key 91ba752a446148c68400d78374b178b4:a01d7dc4edf582496b7e73d67e9e6899 -M format=mkv

Use a fresh mpd from your browser since it's tied to session
https://www.swisstransfer.com/d/6abbb1cf-85ee-4652-88f3-1ff88e5a3795

How to get keys
https://forum.videohelp.com/threads/416316-%5BRelease%5D-WidevineProxy2-Extension-Bypa...s-Lic-wrapping

[z1269925944]

viu.tv all content share the same key which is 91ba752a446148c68400d78374b178b4:a01d7dc4edf582496 b7e73d67e9e6899
you just have to find MPD that's enough
(note: only on viu.tv, not nowplayer or now e.)