[Feature Request] Streamvi, Streamja support (for /r/soccer videos)

As title.
This is mostly because a lot of videos get removed after a few hours, It's good to have a copy to be able to see the video again.
Plus the websites aren't always easy to navigate.

Streamja example:
https://www.reddit.com/r/soccer/comments/km81z3/one_of_the_most_talked_about_60_seconds_in_serie/
https://streamja.com/VZXB1
Direct link:
https://tiger.cdnja.co/v/vz/VZXB1.mp4?secure=yUuotGPjRz3EtiSPMka6mg&expires=1609245000

Streamvi example:
https://www.reddit.com/r/soccer/comments/klw5fo/chelsea_1_1_aston_villa_anwar_el_ghazi_50/
https://streamvi.com/watch/1609180785
Direct link:
https://cdnvistreamviz.r.worldssl.net/uploads/1609180785.mp4

Since the direct links are CDNs they may vary from region to region so I don't know how much they help.

See below for how another app supports Streamja:
https://github.com/SpartanJ/ImgurViewer/blob/master/app/src/main/java/com/ensoft/imgurviewer/service/resource/StreamjaService.java

Start by reading the referenced ImgurViewer service at app/src/main/java/com/ensoft/imgurviewer/service/resource/StreamjaService.java, then locate the corresponding media-source handling in RedReader. Use the Streamja and Streamvi example URLs to verify that both hosts are recognized and their videos can be accessed through the app.