How credible are they? Some say those tips videos are counter-productive and infields are successful after many tries and they mostly do not work at all.

I checked RSD a little bit and their infields came off as fake and only done for marketing purposes. I also checked Todd and his videos were better and I checked his wINNERGAME which is awesome. However, they even make comments to him saying that he is fake.

There are also many other youtubers, who should we trust?