can I export video with transparency background from Adobe Premiere Elements ?
If I can what format should it have and how I remove / clear the background color ?
well it depends on the type of display its going to be displayed on if its a transparent OLED i think black is the transparent color
You need to create transparancy first before being able to export as such or import a clip with transparant background.
Export with Quicktime with an alpha channel (advanced settings) and then convert the file to html.
Transparancy shows as black in Elements. Its not really black but a void.
If you want to test transparancy put a full screen clip under the clip with the transparancy.
Or check the properties of the clip where is says Straight Alpha.
Just change the extension.
Change the extension of the end file as shown below.
Google mov to mp4.