Generated Download link is not downloadable or seekable

[hrehfeld]

https://www.ardmediathek.de/video/Y3JpZDovL3Nwb3J0c2NoYXUuZGUvOGI2YWNkZmEtMTQ1MC00ZmM1LTg1MDAtNmEwMzk0ZWU3YzUw

mpv:

$ mpv https://sportschau-dd.akamaized.net/de/nfsk/2022/07/06/a3d6ff4b-b9de-4e51-b84d-724e0ffb9ac8/a3d6ff4b-b9de-4e51-b84d-724e0ffb9ac8_AVC-720.mp4
[ffmpeg] Seek failed (to 6289891748, size -38)
 (+) Video --vid=1 (*) (h264 1280x720 50.000fps)
 (+) Audio --aid=1 --alang=eng (*) (aac 2ch 48000Hz)
Using hardware decoding (nvdec-copy).
AO: [pulse] 48000Hz stereo 2ch float
VO: [gpu] 1280x720 nv12
AV: 00:00:02 / 04:15:27 (0%) A-V:  0.000 Cache: 62s/27MB
[ffmpeg] https: Stream ends prematurely at 35651584, should be 18446744073709551615
[ffmpeg] https: Will reconnect at 35651584 in 0 second(s), error=Input/output error.
AV: 00:00:03 / 04:15:27 (0%) A-V:  0.000 Cache: 61s/27MB
[ffmpeg] https: Stream ends prematurely at 35651584, should be 18446744073709551615
[ffmpeg] https: Will reconnect at 35651584 in 1 second(s), error=Input/output error.
AV: 00:00:04 / 04:15:27 (0%) A-V:  0.000 Cache: 60s/26MB
[ffmpeg] https: Stream ends prematurely at 35651584, should be 18446744073709551615
[ffmpeg] https: Will reconnect at 35651584 in 3 second(s), error=Input/output error.
(Paused) AV: 00:00:06 / 04:15:27 (0%) A-V:  0.000 Cache: 58s/25MB
[autoconvert] Converting nv12 -> yuv420p
(...) AV: 00:00:06 / 04:15:27 (0%) A-V:  0.000 Cache: 58s/25MB
VO: [gpu] 3840x2160 yuv420p
AV: 00:00:06 / 04:15:27 (0%) A-V:  0.000 Cache: 58s/25MB
[ffmpeg] https: Stream ends prematurely at 35651584, should be 18446744073709551615
[ffmpeg] https: Will reconnect at 35651584 in 7 second(s), error=Input/output error.
AV: 00:00:13 / 04:15:27 (0%) A-V:  0.000 Dropped: 3 Cache: 51s/22MB
[ffmpeg] https: Stream ends prematurely at 35651584, should be 18446744073709551615
[ffmpeg/demuxer] mov,mp4,m4a,3gp,3g2,mj2: Packet corrupt (stream = 0, dts = 5878800).
[ffmpeg/demuxer] mov,mp4,m4a,3gp,3g2,mj2: stream 0, offset 0x2201636: partial file
AV: 00:00:19 / 04:15:27 (0%) A-V:  0.000 Dropped: 4 Cache: 45s/19MB
[ffmpeg/demuxer] mov,mp4,m4a,3gp,3g2,mj2: stream 0, offset 0x220200c: partial file
(...) AV: 00:46:22 / 04:15:27 (18%) A-V:  0.000 Cache: 0.0s/14KB
[ffmpeg/video] h264: Invalid NAL unit size (8126 > 2440).
[ffmpeg/video] h264: Error splitting the input into NAL units.
Error while decoding frame (hardware decoding)!
(...) AV: 00:46:22 / 04:15:27 (18%) A-V:  0.000 Cache: 0.0s/0KB

(...) AV: 00:46:22 / 04:15:27 (18%) A-V:  0.000 Cache: 0.0s/0KB
[ffmpeg] Seek failed (to 6289891748, size -38)

$ wget https://sportschau-dd.akamaized.net/de/nfsk/2022/07/06/a3d6ff4b-b9de-4e51-b84d-724e0ffb9ac8/a3d6ff4b-b9de-4e51-b84d-724e0ffb9ac8_AVC-720.mp4
--2022-07-08 15:29:44--  https://sportschau-dd.akamaized.net/de/nfsk/2022/07/06/a3d6ff4b-b9de-4e51-b84d-724e0ffb9ac8/a3d6ff4b-b9de-4e51-b84d-724e0ffb9ac8_AVC-720.mp4
Loaded CA certificate '/etc/ssl/certs/ca-certificates.crt'
Resolving sportschau-dd.akamaized.net (sportschau-dd.akamaized.net)... 2001:1438:1:24::577b:fa52, 2001:1438:1:24::577b:fa53, 89.27.241.72, ...
Connecting to sportschau-dd.akamaized.net (sportschau-dd.akamaized.net)|2001:1438:1:24::577b:fa52|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 6289891810 (5.9G) [video/mp4]
Saving to: ‘a3d6ff4b-b9de-4e51-b84d-724e0ffb9ac8_AVC-720.mp4’

a3d6ff4b-b9de-4e51-b84d-724e0ffb9ac8_AVC-720.mp4              0%[                                                                                                                                           ]  34.00M  6.35MB/s    in 5.4s    

2022-07-08 15:29:49 (6.33 MB/s) - Connection closed at byte 35651584. Retrying.

--2022-07-08 15:29:50--  (try: 2)  https://sportschau-dd.akamaized.net/de/nfsk/2022/07/06/a3d6ff4b-b9de-4e51-b84d-724e0ffb9ac8/a3d6ff4b-b9de-4e51-b84d-724e0ffb9ac8_AVC-720.mp4
Connecting to sportschau-dd.akamaized.net (sportschau-dd.akamaized.net)|2001:1438:1:24::577b:fa52|:443... connected.
HTTP request sent, awaiting response... Read error (The request is invalid.) in headers.
Retrying.

--2022-07-08 15:29:52--  (try: 3)  https://sportschau-dd.akamaized.net/de/nfsk/2022/07/06/a3d6ff4b-b9de-4e51-b84d-724e0ffb9ac8/a3d6ff4b-b9de-4e51-b84d-724e0ffb9ac8_AVC-720.mp4
Connecting to sportschau-dd.akamaized.net (sportschau-dd.akamaized.net)|2001:1438:1:24::577b:fa52|:443... connected.
HTTP request sent, awaiting response... Read error (The request is invalid.) in headers.
Retrying.

--2022-07-08 15:29:55--  (try: 4)  https://sportschau-dd.akamaized.net/de/nfsk/2022/07/06/a3d6ff4b-b9de-4e51-b84d-724e0ffb9ac8/a3d6ff4b-b9de-4e51-b84d-724e0ffb9ac8_AVC-720.mp4
Connecting to sportschau-dd.akamaized.net (sportschau-dd.akamaized.net)|2001:1438:1:24::577b:fa52|:443... connected.
HTTP request sent, awaiting response... Read error (The request is invalid.) in headers.
Retrying.

--2022-07-08 15:29:59--  (try: 5)  https://sportschau-dd.akamaized.net/de/nfsk/2022/07/06/a3d6ff4b-b9de-4e51-b84d-724e0ffb9ac8/a3d6ff4b-b9de-4e51-b84d-724e0ffb9ac8_AVC-720.mp4
Connecting to sportschau-dd.akamaized.net (sportschau-dd.akamaized.net)|2001:1438:1:24::577b:fa52|:443... connected.
HTTP request sent, awaiting response... Read error (The request is invalid.) in headers.
Retrying.

youtube-dl works:

$ youtube-dl 'https://www.ardmediathek.de/video/Y3JpZDovL3Nwb3J0c2NoYXUuZGUvOGI2YWNkZmEtMTQ1MC00ZmM1LTg1MDAtNmEwMzk0ZWU3YzUw'
[ARDBetaMediathek] Y3JpZDovL3Nwb3J0c2NoYXUuZGUvOGI2YWNkZmEtMTQ1MC00ZmM1LTg1MDAtNmEwMzk0ZWU3YzUw: Downloading JSON metadata
[ARDBetaMediathek] 10634051: Downloading m3u8 information
[hlsnative] Downloading m3u8 manifest
[hlsnative] Total fragments: 1536
[download] Destination: 4. Etappe - die komplette Übertragung-10634051.mp4
[download]  25.9% of ~6.13GiB at  6.45MiB/s ETA 14:19

From Germany.