Nice idea!
What might help though, is to understand who you're aiming these at? If new collectors who already know the basics of terminology etc, then it's a potential winner. There are so many iconic coins you could cover:
- the 1933 penny story
- the Gothic portrait of Victoria
- William and Mary > William III
- trade tokens pre-1797
- the Great Recoinage of silver in 1816, and how the sizes of silver coins remained constant until decimalisation
- Maundy Money
- the Edward VII florin
- proof sets before decimalisation
- the 1951 Festival of Britain crown
- the Churchill crown
and so on.
However, you might also want to do a video for complete beginners, defining such terms as 'obverse' 'reverse' 'legend' 'proof' etc, and emphasizing the importance of condition, rarity, and popularity (the holy trinity of factors affecting coin values).
Good luck and I hope to see many more.