Should work. The copyright status is unknown, as firstly it was thought lost until discovered in the 80's on the kinescope copy. The rights to CR were kicked around until they finally fell into Sony/Columbia's hands who stuck a deal with EON/MGM which gave them rights to the first novel for the first time. but that's all in regard to the novel and the '67 film.
The only official releases of the '54 version are the uncut Spyguise VHS, and the copy on the initial DVD release of the '67 film which does miss the ending bit. this is what I have and what I have seen save for watching the ending on youtube.
Those caps don't look too bad, how in the heck did they obtain a copy to scan in the first place?