I have an issue when I subdivide the edges of my straight objects as per 4:10 in the video. There are large portions of mesh that don't get subdivided and remain the same as before subdividing. I see that the extra vertices are placed but they aren't joined by an edge.
Blender 2.80RC3
I think i had a similar issue. I had to cut al engones (faces with more than 4 vertecies) into quads. Then i subdivided it again. I guess you can't subdivide engons.
