How to upload a video to YouTube from your iPad
Open the YouTube app and then tap the camera icon at the top of the screen. ...
Tap the video you wish to upload, trim it as you wish, and if you want, add a filter using the icon at the center bottom of the screen.
Holding down on the screen on my Galaxy Note 8 phone does nothing. What device are you doing that on?
Here is what I do. Click Share
Then click Copy link
You can upload to Youtube from any device. Make sure to upload as public or unlisted. Then click the share button on the video and copy the link to clipboard. Then come here and paste that link in your massage.
Hard to say without seeing the car. A video would really be helpful. You can upload a short clip to YT then share it here by copying the link and pasting it into a post here.