Surprised to find no recent videos on how to align an equatorial mount or anyone using modern methods. They still recommend manually aligning polaris & they still use rough latitude instead of GPS.

Polaris was never accurate enough for lions. They had to point the camera directly east, taking test photos to align the altitude. Then point the camera directly overhead, taking test photos to align the azimuth. The test photos were made by slewing the right ascension ahead of the stars & letting the stars catch up. Alignment was achieved when the star trails weren't shaped like a V. It took 90 minutes to tweek out the alignment. The process is formally called "declination drift" & it's still the way they're getting the best alignment.

With modern cameras, you can overlay a virtual north pole on the location of the stars in the viewfinder. This can be used to align the mount. A modern phone should be able to align a mount purely by GPS & gravity. The mane problem is aligning the phone with the mount. Declination drift could be automated if the mount has motors.