If you are looking to download a long, technical, or research article (mentioned in the query as "long article"):
Use repositories like CORE, OpenDOAR, or arXiv for free scholarly articles. Download File VID-20170103-WA0033Trim - Highloa...
Right-click the video, select "Open with" > "Photos," then choose "Edit & Create" > "Trim." Save a copy of the edited version. If you are looking to download a long,
If you received this on WhatsApp, it is likely in your phone's storage. Navigate to File Manager > WhatsApp > Media > WhatsApp Video to find it. select "Open with" > "Photos