If you really want to know more about how water freezes, in particular snowflakes exhibiting the hexagonal for shown in the first two video segments here, then watch this video from the premier expert on snowflakes and how snowflakes form. You will be surprised to discover that water can freeze in many different ways under different conditions. This will help you understand that OP's video is not really enough to determine what really happened is due to 5G exposure. The Snowflake Mystery https://www.youtube.com/watch?v=ao2Jfm35XeE