The youtube channel The Modern Martial Artist studies boxing vids because it can be said that boxing is actually a form of martial arts, is this the case though? Would MMA fans agree with this?
Of course it is, and it’s one of the most effective as well, if mma has taught us anything, the most effective martial arts are, in no particular order, Boxing, Muay Thai, wrestling, bjj. Judo, sambo and sport karate/kickboxing. most others take a back seat, (with exceptions of course)
Since 'martial' means warlike, and "art" is defined as creative activity, it's descriptively accurate to say boxing is a martial art.