Problem: How to reduce hand discomfort while walking
Make sure your rings are off and there is nothing constricting on your wrists like watches or wristbands.
Carry a walking stick (or monopod, if doing photography), while walking.
Be sure to switch it back and forth during your walk.

Answer: Carry something smallish that you can grip and squeeze during your walk. It could be something like a foam pad, rubber ball, flashlight, camera, etc.

Problem: People are walking around on the snow. people

Answer: are going down the hill of snow in tubes.

Problem: How to sell videos on istockphoto
Create an account at istockphoto.com.
Sign up as a video photographer. Make sure you read and understand all the requirements for people who submit video clips.
Answer: Take the test required by istockphoto to ensure you meet and understand all the technical requirements. Part of the test requires you to upload 3 video clips.