Atusb You could post a gif
Atusb To expand on FliphoneBochur's answer, you can convert the video to a gif using a website such as cloudconvert.com and post it the same way as an image. or else you can just post the image on google drive, but it wont work as well.
How do I underline text
samtee It's not possible (at least as far as I know).
EDIT: Now I know. Thanks [Login to see the link] !
This is how to make your text [u]underlined[/u].
This is how to make your text underlined.