How-to explanations on NPO Widevine key extraction

[SadToast]

Hi,
I would like to download a documentary from NPO website so I do not need a VPN when watching it later.
Link to the documentary: https://npo.nl/start/afspelen/2doc-queerkamp
I used yt-dlp to do so and managed to get *.mp4, *.isma and *.vtt.
The next step is to extract Widevine key before trying to use N_m3u8DL-RE, but I cannot figure out how to do it so far.
I got the 'stream.mpd' from the Developer Tools of my browser and opened it to get the PSSH.
The plan was to go on cdrm-project website but it seems down.
The backup plan was to use the server shared by _steam_ but it failed.
The license URL may be wrong. Should I use 'https://npo-drm-gateway.samgcloud.nepworldwide.nl/authentication' or 'https://licensing.bitmovin.com/licensing'?
Could you please suggest to me the right way of doing it?
Thank you for your help

[forget]

SUCCESS
License:https://npo-drm-gateway.samgcloud.nepworldwide.nl/authentication?custom_data=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJucG8iLCJyZXF1ZXN0X2lkIjoiMzQ5ZTFmNmMtYWMxMC00OThlLThjNmMtODI4MTU5YzRlMTUxIiwiaWF0IjoxNzcyOTYzNzg4LCJsaWNlbnNlX3Byb2ZpbGUiOiJ3ZWIiLCJkcm1fdHlwZSI6IndpZGV2aW5lIn0.MbIn7U1F6ai1EKuYwDauDDwZzGvBqjFkzLnJwkC5Fx0

PSSH:AAAAXHBzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAADwIARIQ0Rwb6GtMvUFeDNtm7IDg/BoIdXNwLWNlbmMiGDBSd2I2R3RNdlVGZUROdG03SURnL0E9PSoAMgA=


Time:Sun Mar 8 05:57:01 2026

d11c1be86b4cbd415e0cdb66ec80e0fc:6b8d72557a75c116983ec859d610184b

[cedric8528]

WidevineProxy2

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


[Attachment 91437 - Click to enlarge]

[SadToast]

Thank you to both of you! WidevineProxy2 provided the same kid:key as suggested and N_m3u8DL_RE worked well with it (just had to merge audio and video decrypted files with ffmpeg).