You can send videos in Gmail on mobile and computer. You can do this on the Gmail app on iOS and Android and you can do this ...

Then click on the "Attach File" menu item (it has a paper clip icon beside it). In the new file browser window, navigate to the folder that has the file or files you wish to attach and click on ...

Apple makes it easy to change icons for files and folders on Mac. Here's how it works, along with tips on using images or changing the folder icon color.