Chine : authentification d’une vidéo qui documente le déplacement massif de prisonniers ouïghours

6.75*(1/0.76) = 8.88
Therefore we know that the pole is ~8.88m tall.
All we have to do to find an approximate date is play around with SunCalc (http://www.suncalc.org ) and find the time/day where an 8.88m object casts a 5m shadow with a sun azimuth of 173.4°

12:06pm, Aug 20th