IMHO (and I am an IT freelancer myself for 20+ years): No.
At least as long as you are looking for the "typical" IT projects, i.e. Linux-/Unix-Admin, JEE development, SCRUM master and the like. No coporate clients or recruiting agencies who recruite freelancers for coporate projects read tweets or wach your YouTube videos. They will only be interested in your CV.
In case you are looking for a differnet career as an independent speaker, author, advisor - you name it - the answer my be different.
I had been doing publication work (writing articles for well known IT publications back then) in the 90ies. It was fun, it was some money, but never ever did anyone call and say: I read your article, please could you do a project for me.
And don't underestimate the time it takes to do some meaningful publication work, no matter on what chanel. I found in my career that many bloggers / authors or conference speakers are employees in large corporations, public service or academics who ... let's say ... are not always under full utilization at work and can do these things on their employer's time.