Hi,
You don’t state the year model of the vehicle.
Here are a couple of YouTube videos showing how to replace the rear bumper in a Hyundai Accent.
[https://www.youtube.com/watch?v=bVo5QYQmlQg|unknown year model Accent]
[https://www.youtube.com/watch?v=f2UymbUXzCw|2008 Accent]
You may have better luck finding more. Just search for “''(insert year) Hyundai Accent rear bumper replacement”'' on YouTube.com
Whilst not a video, here’s a [http://www.hamanual.com/rear_bumper_repair_procedures-1223.html|link] to the repair procedure, with pictures, for the rear bumper for the 2010-2019 models.
Here’s a link to the [http://www.hamanual.com/hyundai_accent_2010_year_service_manual-314.html|2010-2019 Hyundai Accent service manual], which may also be of some help. Scroll down to the ''Body (Interior and Exterior)'' section.