Now you open the Revanced app, go to the Patcher screen and "Select an application." Tap storage and navigate to the Infinity APK you downloaded. Tap "Selected Packages" and tap the gear next to "Spoof client." Enter your ClientID, which you get from:
After you enter that, tap Patch and wait patiently for your modded APK to be built. Now install that new APK and you should be set!
Obviously you should test any APK on VirusTotal (or similar) to make sure they are not malicious, but yeah. Please downvote me to hell if any links I posted are bullshit.