First of all, this is not my channel, I know the title is click bait, but there is nothing I can do about it, I didn't make it. People are a bit to quick on the downvote without actually watching it.
Second, I posted it because I thought the content in this 5min video is very useful, let me summarize:
Lets say you find an item ilvl 612 with all the the properties you want but the roll is very bad (for example min roll for critical chance)
Upgrading the item via blacksmith to ilvl 625 or above will force all stats to reroll, so that min roll could potentially become a max roll
Imprint a sacred affix on a regular legendary will make an item sacred, which will allow you to upgrade it additional 2 times via blacksmith
So the takeaway is, if you find an item that has all the properties you want but it rolled very bad numbers or it's not sacred, don't disenchant it, it can potentially be very good when the stats reroll after upgrading it to 625
I also saw this video in my YouTube homepage because I've been searching d4 info. The content was quite useful. I play rogue and the author of the video (wujido) wrote rhe maxroll guide for both the twisting blade and trap build on maxroll.
I know people are down voting you because of the title. Is the post title tied to the link? If not, what might be more useful is a title like "Useful video on gear upgrade breakpoints" with a description acknowledging that the title is click-baity but that you found the content useful.