Beginning at 1:40: If the straps bothers the back of your ears after awhile -- Use 2 rubber bands and a paper clip to extend your mask straps so that the extended strap is around the head rather than attaching behind your ears :

"Tie" a rubber band around each strap (just loop a rubber band around each strap). Then unbend a paperclip so that have a hook on each end (so it's kind of an "S" shape). My variation is to just use a large paperclip as-is (not bent or reshaped), so that the thing doesn't come apart as easily when you aren't wearing it.

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Beginning at 2:15 - fogged up glasses: pull the mask up to near the top of your nose and have your glasses in front of the top of the mask).

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The first part of the video is "macne" or mask acne.