Good job Jesse.
I like the casual discussion format. It comes across as "easy listening" and "humble". And it is good to see the status update, showing well the "learn as you go" through the process.
But some of the issues uncovered could be resolved here on the forum (quicker than comments on youtube). But feedback is a valuable tool regardless of where the feedback is provided.
For example, to attach the stainless liquid valve...it's threaded, right? Can you find a copper adapter that would thread into the valve and solder onto the liquid outlet? If the thread sizes are not available, then perhaps it is easier to find a valve that will work. Instead of trying to force "the square peg" into "the round hole", select a solution which will meet all of the requirements. My LM needle valve uses compression ferrules and swages onto the tubing, both inlet and outlet.
Also, I would likewise vote for the keg boiler...it is a more robust solution than trying to convert your mash tun to a boiler. A mash tun, especially a heated mash tun, is always a good tool to have. Many of us use recommissioned kegs as boilers...for many reasons; durable, right sized for hobbiests, economical, and the Sanke tap makes an ideal mount for your still head via a 2" triclover clamp.
So, I apologize for derailing this thread with comments regarding the issues you posed in your video. I suppose you do actually have a build thread running to address those.
In any case, the videos are well produced and entertaining. Although there are many videos posted on distilling, many, if not most, are often misleading, misinformed, or just plain silly. And many challenge the viewers' attention span.
The Still It series has a personality all its own. Keep it up.