Think He Might Not Be Well :(

[Syphoniera]

Have you noticed any dead snails or many empty shells?
The agitation and odd bit of scraping sound all too familiar.

I've just had a look at the video - if I'm accurately seeing the speed he's moving at, I'd worry.
That's good observation - the unusual speed and type of movements your fish may show when distressed are often the first sign you see of a problem.

You said it was more of a twitching...
Does the flicking not happen that often, but sometimes seem to be an oddly long, careful scraping, rather than a short, fast flicking?

Edit: just thought I'd mention, as somebody made a typo earlier saying 80 degrees, where many of us keep betta temps anyway, would keep ich at bay, that temps from 82-84 (some say 86, actually) have been recommended by some to reduce the reproduction of ich, but there are heat-resistant types becoming common, so increased heat even to 86 degrees without salt/meds may do nothing but encourage worsening infection.

 

[ellena]

Come on! You can't say I ought to worry and not say what about!
No dead snails. The flicking isn't that often and is both long and slow and fast types.

 

[Anna Robinson]

i honestly would stop to melafix! some bettas (and other fish for that matter) do not tolerate the med well.

It's a fishkeeping myth that Melafix is unsuitable for Bettas. API have extensively tested Melafix with Bettas and also multiple species of gouramis - there are no problems.

 

[loraxchick]

it is NOT a myth...ive experienced myslef that SOME bettas do not tolerate them well. lab tests are one thing under very controlled conditions and "lines" of bettas, but they are so extensively bred that SOME bettas have litle or no tolerances for melafix. that is why i advise betta folks to start with a HALF dose and see how the fish reacts. it is soooo sad to learn the hard way.
and either you are just a HUGE fan of Mars Fishcare products, or you are just pushing the med that the company makes(do you work for them? this isnt the first time ive seen you post about their specific products).