Does anyone have any videos they have found or made on how to root the extensions to make them blend softly? Any tips or tricks?

With them in the hair? Or before installation?

I did one in the last couple weeks prior to install. I used a hair works caddy, their new ultra one. My IG is @laceymaemakeup if you want to check it out. I basically did the very top of all the roots on a table, then I put them on the caddy and pull down the root and blend it out with another brush. Worked perfectly!