Loading bar, alpha channel. With alpha matte you can choose whatever background you like.

Name: Loading Bar Alpha Channelwith Alpha Matte
Uploaded: 2017-10-12T00:00:00.000Z
Duration: 10 s
Channel: Barbara Baranowska
Description: Loading bar, alpha channel. With alpha matte you can choose whatever background you like. Stock Footage Video (100% Royalty-free) 31684537 | Shutterstock