I hear your concerns about privacy, however
- uploading a copy to youtube doesn't impact the tutorial playback on vimeo, you can continue as you were
- gives the end user another option with faster playback to save valuable time
- user can access from any device at a lower bandwidth cost, anywhere (mobile, tablet, laptop, PC)
- each individual user downloading his own copy from vimeo results in duplication of the same action
- not to mention its extremely cumbersome to download all the individual tutorials and arrange them in correct order for playback (they are not numbered sequentially when you download so do not auto arrange easily)
- affinity could make these available in a single download if they still want to avoid youtube (not holding my breath for this one however)
I think overall, making tutorials (as well as the F1 help file within the Affinity photo itself - online, pdf) more readily available may increase adoption rates for the software - given how well featured and cost effective it is.