Difference Between Hot Press Paper and Cold Press Paper (Watercolor Beginner’s Series EP.#01)

This video, https://www.youtube.com/watch?v=CzYKQCSe8Uo, can also be seen at https://www.youtube.com/playlist?list=PLCrC8hQc6kC0CbOid3iqU54KPNMbShHlE.
See the rest of the story at http://trade.ingelahalvarsson.com/difference-between-hot-press-paper-and-cold-press-paper-watercolor-beginners-series-ep-01/