Maik and Michelle from SV Seefalke have produced a number of approach-guide videos specifically for sailboats for challenging harbors/marinas that they have visited and publish them on Youtube.
So far they have published:
Approach Kiel Canal locks, Kiel Holtenau, Germany, published Aug 30, 2018 – https://youtu.be/qoDUSZSWDDc
Approach Lisbon, Portugal, published Nov 30, 2018 – https://youtu.be/FmqA9yBeSvE
Approach Rabat, Morocco, published Dec 25, 2018 – https://youtu.be/RZ99Q83wyf4
Approach Mindelo, Cape Verde, published Jan 31, 2019 – https://youtu.be/J8IbKQ5TIQo
Approach Marina Jacaré Village, Cabedelo, Brazil, published April 3, 2019 – https://youtu.be/KnKsMnNZde0