Not working efficiently enough is the key. RTFM is a skill and it takes patience and practice. Investing that time is worth it as it is ultimately the fastest way. And you learn peripheral information along the way. If getting the job done now, then do what works for you.

I would however warn against watching video. Watching videos is the slowest way to learn something. Think about how often you watch at 4x only to jump around and miss what you are looking for. Compare that to using a wiki or an old fashion book. Skimming and jumping around is much easier. But once again, do what works for you.