Searching on YouTube works wonders, but YouGlish is a website that, in my opinion, is better... if you work with both, you can see your classes on YouTube and practice phrases on YouGlish.
YouGlish lets you change the language that you want to get results on, it has a bar here where you can type the word that you need phrases from, and when you click find it lets you see all of the videos that have that word (it marks it and lets you pasuse for you to write, or rewind for you to practice).
https://youglish.com/chinese
https://youglish.com/