programem ffplay nejde přehrát videosoubor z facebook (!info níže), jinými ano

Nevíte, proč mi nejde přehrát soubor videa, který patří k konrétnímu video na facebooku?
URL :%URL%= https://scontent.fprg1-1.fna.fbcdn.net/..._n.mp4?_nc_cat=100&e&=9AC89A. (jako příklad, pro ukázku jenom .. Samozřejmě kontroluji, aby to dlouhatánské URL plné podivných base64dat a hashů, bylo celé -- mimochodem nevíte, co ty query stringy znamenají??)

_nc_cat --- 100
efg --- base64text btoa(formát audia)
_nc_ht --- scontent.fprg1-1.fna
oh --- da080...843b0ed2be84a...294c
oe --- 5D...97

program ffmpeg, ffplay hlásí: Resource temporarily unavailable
Jiné programy (wget, přehrávače, browser) dané URL přehrají

wget --spider %URL%
Délka: 730254 (713K) [video/mp4]
Vzdálený soubor existuje.

Dál, proč mi nejde wget -O - %URL% | ffplay -

aac @ 00000087a0af5b40] Input buffer exhausted before END element found
aac @ 00000087a0af5b40] Prediction is not allowed in AAC-LC.
... aac @ 00000087a0af5b40] napořád
Number of bands (20) exceeds limit (11).
channel element 0.0 is not allocated
Number of bands (32) exceeds limit (26).
channel element 1.5 is not allocated
Number of bands (8) exceeds limit (5).
No quantized data read for sbr_dequant.
Multiple frames in a packet.
channel element 3.14 is not allocated
Reserved bit set.
Pulse data corrupt or invalid.
Reserved bit set.
Gain control is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file
as a feature which has not been implemented.
channel element 0.14 is not allocated
channel element 2.11 is not allocated
Number of scalefactor bands in group (55) exceeds limit (47).
channel element 3.6 is not allocated
channel element 2.11 is not allocated
channel element 3.6 is not allocated
channel element 2.2 is not allocated
channel element 2.8 is not allocated
Number of scalefactor bands in group (55) exceeds limit (47).
channel element 3.4 is not allocated
Reserved bit set.
ms_present = 3 is reserved.
Number of bands (24) exceeds limit (2).
Number of scalefactor bands in group (50) exceeds limit (47).
Reserved bit set.
Number of bands (19) exceeds limit (12).
Number of bands (11) exceeds limit (10).
Reserved bit set.    0KB sq=    0B f=0/0
Number of bands (22) exceeds limit (21).
12% [=Reserved bit set.
=[===Prediction is not allowed in AAC-LC.
==Reserved bit set.   0KB sq=    0B f=0/0
===[=>     Prediction is not allowed in AAC-LC.
   L a s  t    mess a  g    e          r] ep89e 536 a t  e   417K/s  d         1  t im es    1       t    i    mes
Sample rate index in program config element does not match the sample rate index configured by the container.
Inconsistent channel configuration.f=0/0
get_buffer() failed  0KB sq=    0B f=0/0
channel element 2.8 is not allocated
Number of bands (27) exceeds limit (5).0
Reserved bit set.
Prediction is not allowed in AAC-LC.
channel element 2.1 is not allocated
channel element 2.14 is not allocated0/0
Sample rate index in program config element does not match the sample rate index configured by the container.
Inconsistent channel configuration.
get_buffer() failed
channel element 2.9 is not allocated=0/0
Reserved bit set.
Number of bands (9) exceeds limit (6).
Reserved bit set.
Number of bands (47) exceeds limit (32).
Sample rate index in program config element does not match the sample rate index configured by the container.
Inconsistent channel configuration.
get_buffer() failed
Number of scalefactor bands in group (48) exceeds limit (47).
Reserved bit set.
Prediction is not allowed in AAC-LC.
channel element 3.8 is not allocated
Sample rate index in program config element does not match the sample rate index configured by the container.
[Inconsistent channel configuration.
get_buffer() failed

To vypadá, jako když ffplay nerozpozná typ souboru nebo co... (verze 2019--04-14)