It was recorded by my father, about my Winter-swimming on last day after winter's real coming in last week. 
<p>During this video, my father was talking with another Winter-swimming friend in Chinese language, about the weather - warm, what need to provide for family-member's Winter-swimming and whether it's cold in the water or on the bank. My answers were: on the bank, because of the wind, usually, it felt colder than in the water... And, I was fine to take a round swimming path from regular practices since the later spring of 2019. 
Finally, because of the shaking of my father's hands (with the mobile for long), I had to make two video pieces - one is 4.41 minutes, and the other is 2.12 minutes. By putting both together, we can get 6.53 minutes as the time. (I thought the time of 'getting to the water' can be supplied with 'from the water, getting to the 'ladder')
I thought it could be a good self-learning material - Forward Rolling, Backward Rolling, Whale Beating, Frog boy-way... all for the warmth and the continuing. 
</p>
It's the first part.
<a href="//commons.wikimedia.org/wiki/User:Jason_M._C.,_Han" title="User:Jason M. C., Han">Jason M. C., Han</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>