The simple word "thank you" without comment is usually removed. There was a lot of controversy about this. If you want to thank a person or several people who answered your questions, combine everything in one post, we often see a simple "thank you" answer that is written to everyone who answered. Just make it clear that you understood everything that interested you, and here you need to be a little more eloquent. And also in addition to what you watched, and you liked any answer, you can use merit (well, I think everyone is familiar with this)