Hey!
I made this new cool video presenting a very easy way to turn any kind of flag in Minecraft into a waving flag.
I think it could be especially nice because of the 4th of July being just around the corner, which definitely creates the opportunity to build o a contraption like this in your singleplayer or multiplayer world! :)
Anyway, here's the link:
youtu.be/HUytPYZDcO8