This Chemical Cuts Like a Knife

I appreciate the note at the beginning of the video, "Hoping YouTube doesn't flag my video".

The YouTube algorithm is tricky and must be appeased.

The reactions shown, however, aren't all that tricky.

ferric chloride = iron(III) chloride = FeCl₃
sodium fluoride = NaF
potassium thiocyanate = KSCN

The first reaction, the one that produces the 'blood' is this one...

FeCl₃ + 3 KSCN --> Fe(SCN)₃ + 3 KCl

The 'blood' is the iron(III) thiocyanate. The initial reactants here are slightly yellow (FeCl₃) and colorless (KSCN).

The 'healing' reaction then is between the iron(III) thiocyanate and sodium fluoride to produce a complex ions.

Fe(SCN)₃ + 6 NaF --> Na₃[FeF₆] + 3 NaSCN

The Na₃[FeF₆] is a colorless, complex ion called hexafluoroferrate(III).

I'm not sure what the disposal of the thiocyanate compound is, but the complex ion should be mostly fine for easy disposal.

Source of reaction - link