I have only looked at the one youtube video (4 months ago) referred to above and am having difficulty seeing them as one and same person as the above pic of Syd.
Could be just me, but IMO the girl in the video looks much younger than Syd and has brown eyes when Syd is reported to have blue eyes.
How has it been established that the youtube channel does in fact belong to the Syd West who is the subject of this thread?
It seems like this youtube channel was used by Syd and her 10 year old sister to create videos together. See 0:35 mark of the video called Organizing Wardrobe and Rolling Up Tees!