fishbaits: No idea if they still do them, but youtube search for "Yrmir", they used to do loads of Terraria clips, including some machines to farm items & boss fights.
Could always give hints for things to do/build :)
Yrimir hasn't done any mob grinders and farming setup videos since around 1.1 or 1.2 at least. he's mainly been sticking to his traditional crazy boss kill videos. I don't think many are doing any right now either, most are too busy doing playthroughs of 1.3 on both normal and expert but mostly expert. The last few I found were Frost moon event mob grinders for console players since that was the last update they got, they are still two updates behind PC as they still need 1.2.4 which was the fishing update and of course 1.3 which may take sometime since the team who did the coding for 505 Games(who published the console and mobile versions) Engine Software, are currently doing the Terraria: Other World spin off for Re-logic while Red focuses on whatever his next project is.
But I know quite a few Terraria console players and console youtubers are going to be miffed when 1.3 does drop on consoles as they can no longer "cheat" via developer items since they are finally obtainable through legit means but also got nerfed at least for those who aren't part of the dev team anyway. Like I'm sure Red, Cenix, Loki, and the rests stuff still has there original properties for them.