Making a plural noun usually happens by adding -s except when:
1. a noun ends in sh, ch, x, s, or z
2. a noun ends in a consonant and the letter o
3. a noun ends in a consonant and the letter y
4. a noun ends in the letter f
5. a compound noun follows the same exception rules
6. a noun forms a plural by taking on an irregular spelling.
The link for the video @ https://youtu.be/K9Izz490K2E