Gosh, Michael.. I have no idea... maybe because I tend not to shoot videos at all!

Because people don't know better!  I correct people on a regular basis.

wiggling hand without a tripod.  Want me to watch side ways or upside down  ???

They shouldn't. And I think you get those wide bars on the sides of the video when shooting vertically. Not sure the smartphone is the best product for shooting a video you want to impress consumers with. Maybe fine for those fune family videos or to upload immediately to YouTube

Thanks for the question.

I agree with Kenneth J. Jones - there are just some things people with out the knowledge should - pro's do it so much better

Michael Setunsky - this is indeed a great tip for members who use smartphome for videos...

Becasue they don't know better. It is so simple to turn the phone.

I generally turn the camera the right way, but that day I was using a new bracket and forgot to turn the camera horizontally.

   Because they are trying to save money by taking the video with a smartphone.  Bad idea from the start.

If you are doing a video, my question is why not spend a few dollars and do it right.  Cell phone video's yell cheap!!!

Great question. I'll have to see if my selfie stick does horizontal. I haven't used the thing since I won it in a drawing a few months ago. 

Drives me crazy seeing pictures or videos recorded the long way instead of the wide way.... just saying

Good Question.

Michael,

I have not seen that!  Like Kenneth J. Jones said, they are not focusing on the result and the time spent in the editing room.  A

Good question. And, I don't know the answer to that one.

Michael, my chant is always SAY NO TO VERTICAL VIDEO. I haven't a clue as to why people try to capture their view in this manner. Our eyes and brain don't like it much either. 

I've seen people tend to shoot vertically and the best shots are horizontally.

I have seen people do it both ways.

That is a great point for better exposure.

I can imagine capturing the ceiling and floor (vertical image) conveys more information than images of the wall (horizontal) and what may be hanging on it. Because it is video, it is very easy to pan non-moving scenes horizontally. Panning vertically, often required with shooting horizontally,  is distressing to the viewer.

Have you noticed that the image ratios of a UHD (4K) images? Take a trip to Best Buy and question why the ratios have changed so dramatically, away from the horizontal format on their high end flat screen products.

Be aware, some hosting services will format the video or image to comply with their capability and may not be the creators choice.

An example exists here on AR. An image I want to use is presented horizontally when the proper orientation is vertical.

NOTE: I do use wide angle lens but do not use wide screen format for the very reason mentioned. I would never use a smartphone as the source for a product the public will see.

I don't take videos of my listings.  If I did I wouldn't us a smart phone.