Had a look at your video. The bolt in question was already out and you snapped it putting it back in. From the look of the broken bolt, the broken piece in the rear cover is too far in and you will not be able to get pliers or anything else on the piece to remove it. You will have to remove the clutch cover regardless, even if it is to just see how far in the broken piece actually is.
Never heard of using super glue before but stranger things have happened.
If something like that does not work, my recommendation is to remove the engine and drill the broken piece so you can use an "easy out"/stud extractor and remove the broken piece. If this does not work, drill the broken piece completely, tap and use a new bolt. The bolt is steel, the case is aluminum. Easy for the drill bit to wander when drilling into the broken steel piece and ruin the rear cover especially when you cannot see what you are doing.
In my thoughts, there is no easy quick fix for your issue, and to try and do this with the engine in the bike will not result in success. There is not a lot of room with the engine in the bike for drills, extractors and such, and you need to see what you are doing. If you do try with the engine in the bike, I would source a new to you rear cover (the one the clutch cover fits on) and have it on hand. The bike is already out of commission because of the leaking clutch cover.
To centre punch the broken piece I would use a spring loaded self-striking centre punch like this:
https://www.leevalley.com/en/wood/page.a ... at=1,43456
Not the easiest way to do the fix, and probably did not want to hear this, but you need to see what you are doing, and you need room. Have learned over the years and from personal experience that the easy way out is sometimes not the least expensive, and I always had time and money to do it twice.
Good luck.
Cheers