You missed the relief angle, the secondary angle, the cutting face is a compound angle of two intersecting angles that is determined by the material being cut. There are reference charts available for that info. on line.
I could of sharpened 100 bits free hand on a belt grinder in the time it takes to make this. BTW cut off wheels are not made for side impact or grinding. Keep doing it and one will explode very violently. Furthermore most drill hex nut is close at 60 degrees but it is not 59 and the wider the bit the more it will be off. Even that 1/2 inch bit you could tell is off. Plus there is another 10-12 degree angle you need to relieve the cutting edge you are totally missing. It is a compound angle. Then lastly my final thought is most abrasive wheels are NOT made to cut aluminum and doing so can make them explode. I see people do it all the time but it will get them one day. Aluminum load up in the pores of the wheel it gets hot and expands and the wheel blows up. But what do I know I only went to school for welding and machine tooling and got a proper education on the subject and do not rely on want to be hacks to show me unsafe ways to do one of the most simplest trades in the business. I did not finish the video to see the results because everything you did to get them is teaching others bad habits. People get a standard bench grinder and dress the wheel and watch a couple videos on how to free hand with a drill guide to keep to point centered and the 59 degree angle. It is a skill that will lat you a life time. You can take a Broken bit and make it cut like new.
PLEASE, viewers of this video, DO NOT attempt this method. What a load of crap! This should be removed form youtube! This NOT the way to sharpen drill bit. This is the worst drill "sharpening" I've ever seen. There are so many things wrong in this video, including the DANGEROUS USE of cutting disks. The angles are wrong, at 8:27 you can see how bad the angles are!
Crazy idea. Using the side of a very fragile disc! How it didn’t shatter I’ve no idea. Just use a bench grinder. It’ll sharpen and polish almost every tool.
Before I changed my Surname, it was Vanderbilt and I have always kept a supply of at least 500 brand new drill bits in a bespoke cabinet especially set aside for them. I merely throw away any drill bits that, like the rest of my family,..........become "Dull", dear boy.