The largest F that I could find is this. It's an unknown (to me) gothic type. The one in the video above looks subtly better though, note e.g. the more square 'droplet' at the bottom of the staff, which is round in this version:
This is the original Olympus - F logo. It always had that round droplet. On the camera itself it originally was a line engraving, inlaid in Gold color:
That Gothic F letter is not part of a computer font that you can download and use in word and scale to any size etc
When the film Pen-F came out in 1963, computers still used punched paper tape, magnetic core memory or the just invented DECtape. The only font were the letters in the teletype typewriter. Newspapers were printed using cast lead letters or hot metal typesetting, which did cast individual lines in lead using Linotype machines. Just Google Linotype. Computer fonts only came maybe 10 years later
Back then the marketing artist at Olympus would have hand sketched that letter F based on pictures taken from some old handwritten books in a British library or monastery.
Today that Gothic F letter is a registered trademark logo, wholly owned by OMDS. You won't find an exact match in any modern computer font, simply because it was purpose made by an artist to perfectly fit that one particular film camera top plate shape, and is unique.
A laser engraver will be able to scan that large logo at the top of this post, it has more than sufficient resolution, and reproduce it on a modern Pen-F body. It will look gorgeous. I would personally fill it with gold color like the original camera was.
White on black was used for the lens cap. You can buy plenty of lens caps with that exact F letter, just printed, or raised 3d printed, or embossed, on ebay for reasonable money.
