I watch YT sims videos every day (almost too much haha :D ) and I mainly watch building videos. Below are some letsplayers/builders that I really enjoy:
Deligracy and The Sim Supply - Love their personality!
Lilsimsie - Her builds are very usable and I use a lot of them in my gameplay. Her celebrity bowler series is very funny. I am also about the same age as her so that makes her especially relatable and it's nice to see someone growing up with me :D
Simlicy - I would definitely recommend Simlicy for simmers who like to watch building videos. Her builds are really detailed, homey and beautiful. Her commentary mainly focuses on the build so it really allows you to understand her thought process when building. She also has a Not So Berry challenge series (I like that it is more story-oriented compared to the others).
TheTidesChanging - I have discovered her channel recently. She creates very (and I mean very) detailed backstory for her sims and builds. I have been enjoying her recent Caliente Family short series.
