I find this particular routine to be a bit fidgety and there's an awful lot of over convincing going on here. So much time is spent ensuring the spectator that the two packets are four red and four black - that you begin to lose a bit of the actual power of the effect during the process.
The actual separations are nicely done and well handled, I just think the overall presentation could be streamlined to flow a bit more.
During the process of the actual effect, the displays are fine - but the beginning of the effect can easily be modified to reduce the amount of time between the display of the two piles to the actual workings of the effect. For me it's over convincing, which makes it suspicious.
Second link didn't work for me - loaded the page, but no video was there. What was that one of?
I would like to clarify your point that I do buy items and books and also I try my level best to get the history of each trick so that credit is given to the creator.