A few BF members can account for how I pack. I use a box-in-box method.

Basically, a process: Find a pair of boxes that fit inside the bike box. Add strategic slits in each, slide the head tube into one box, slide the rear dropouts into the other so the bike is forced into a good position with both ends safely off the ground and away from the outside of the box. If necessary, add additional boxes under those boxes for elevation. Then drop a foam block under the BB shell, and boxes or foam around the bike as necessary for added support. I normally put foam around the tubes and fork blades, then zip-tie the fork to the DT with the blades positioned around the ST, and if I have a plastic retainer, I'll drop it between the front dropouts, but usually find that's unnecessary, frankly. If you're really concerned, you can tape a 1x2 or 2x4 between the rear dropouts after you insert them into the box.

I've (knock on wood) never had a problem with frame damage. Even with the best, most professional bike packing I've received frames/bikes with damage using methods similar to those posted on YouTube and even here at the forum.