You are right, the DIY vids are great
it’s awesome to watch training videos on youtube.
I am refinishing my garage and going to do a checkerboard pattern on the floor.
If I had not seen some concrete videos I would have screwed that up- the first bag was a mess- but after watching one video I realized that I had to dampen the floor first or it just sucked the moisture right out of the top coat befor I could smooth it.