I remember the opening of Suspense Theater (very creepy opening, IMHO). Didn’t watch the rest of them - I was a kid not interested in such shows but remember the names 87th, Checkmate, Amos Burke (later Burkes Law, starring Gene Barry who in his Bat Masterson and War of the Worlds days was one of the handsomest actors ever).
That Youtube includes some British shows, notably the Baron, by Terry Nation, creator of the Daleks, so that explains why some would be unmemorable here in the US!
I'm a Dr Who fan and didn't know that!
The Baron was filmed in Great Britain but only aired in the States for 6 months in 1966. John Mannering (The Baron), an American antiques dealer would be called in by MI-6 when an espionage case demanded his particular expertise.