He doesn’t look like much right now, but this is a future Bullet Bill. There will be many like him, but this one is mine. I did not do mine using the same steps. I made the sphere, show x-ray, changed my perspective slightly while still in user perspective, deleted the vertices I didn’t need, moved it along the zed by 2, add the cylinder, moved it along the zed by 1, alt-m w/ by distance, selected the interior face and deleted it. If we are removing unnecessary vertices by “merging them”, why have the unneeded face? And if I need it later, I can fill it in.
I also struggled with the remove doubles like everyone else has mentioned. I kept replaying the video, going over my different options, three web pages and a YouTube video thinking I was blind, nope. I’m sure they will update this video at some point.