The video, deals with the first two subjects, the third is a subject of much contention creating clear vernacular delineation of what IS and what IS NOT considered by the various denominations of the fraternity.
The ordinary meaning of this word is secret, hidden. The French word clandestin, from which it is derived, is defined by Boiste (Pierre-Claude-Victor Boiste – Dictionnaire universel de la langue française, first published in 1800) to be something:
fait en cachette et contre les lois.
Translated to mean – done in a hiding-place and against the laws (or, as translated by Google Translate – made secretly and against laws), which better suits the Masonic signification, which is illegal, not authorized. Irregular is often used for small departures from custom.
A body of Masons uniting in a Lodge without the consent of a Grand Lodge, or, although originally legally constituted, continuing to work after its charter has been revoked, is styled a “Clandestine Lodge.” Neither Anderson nor Entick employ the word. It was first used in the Book of Constitutions in a note by Noortbouck, on page 239 of his edition (Constitutions, 1784). Irregular Lodge would be the better term.
One made in or affiliated with a clandestine Lodge. With clandestine Lodges or Masons, regular Masons are forbidden to associate or converse on Masonic subjects.
In the Book of Constitutions, Noortbouck’s comments read, first under the Abstract of the Laws Relating to the General Fund of Charity
IV, page ii:
No person made a mason in a private or clandestine manner, for small or unworthy considerations, can act as a grand officer or as an officer of a private lodge, or can he partake of the general charity.
Interestingly, they tell us their reasons:
And then Under the Making of a Mason (page 394 and 395), ART V
A brother concerned in making masons clandestinely, shall not be allowed to visit any lodge till he has made due submission, even though the brothers so made may be allowed.
and, ART VIII, page 395:
Seeing that some brothers have been made lately in a clandestine manner, that is, in no regular lodge, nor by any authority or dispensation from the grand master, and for small and unworthy considerations, to the dishonor of the craft; the grand lodge decreed, that no person so made, nor any of those concerned in making him, shall be a grand officer, nor an officer of a particular lodge; nor shall partake of the general charity, should they ever be reduced to apply for it.
From a Short Talk Bulletin, Vol.XIII, No, 12, from 1935 says definitively (for that time) that,
Today the Masonic world is entirely agreed on what constitutes a clandestine body, or a clandestine Mason; the one is a Lodge or Grand Lodge unrecognized by other Grand Lodges, working without right, authority or legitimate descent; the other is a man “made a Mason” on such a clandestine body.