Some helpful caption/subtitles is for videos which don’t have dialogue but add information to what’s going on. One example is primitive technology but there are plenty of other skill presentations/tutorials where the how and why is spelled out in the subtitles while the actual audio is just peaceful melodies to enjoy watching someone work too.
It always makes me wonder what delicious flavors nature has provided that I’m missing out on. Just like Banana’s in the states, we have a “main” variety of apple which is “Red Delicious” (it’s just a name, not delicious). This abomination is the prettiest picturesque apple you’ve ever seen, but it tastes like cardboard compared to any other apple species. I wish we still had access to all the different varieties of banana’s that used to be around but guess we’ve fucked that one up.