If you fly RC planes or multirotors then you may find that liquid tape is a really useful thing to have in your toolbox as an alternative to regular tape or heatshrink.
The brand in this video is just what the local electrical wholesaler had available so I don't know if it's any better or worse than other brands so I suggest you just purchase whatever *is* available near you.
It's wonderful stuff and I'm finding new uses for it all the time.