I'm not sure to be honest. If I was to guess I would say that the section at about 0.44 in the video might be a vegan as this was where alternative milks and yoghurts were. There was also an excellent selection of vegetables and fresh fruit. I would recommend contacting the hotel to enquire. They are very helpful and quick to reply.
An update: To eat here well is possible. The breakfast: The bread is vegan (I‘ve asked the marketing manager, who checked it with the kitchen staff). There are always fresh vegetables and fruits and salads. There is also provided a variety of plant based milks: Soy, Almond, Oat & Rice. There are also oats and other cereals always served. Peas, Beans in tomatosauce and fried potatoes are served also.
Dinner: Every evening there is a new theme night (Greek, Italian, Asian, Gala dinner, Mexican, ). Beside the buffet, they‘re serving a selection of four plated dishes. But so far, there were no vegan item on that selection. The hotel declares every hot dish with dietic informations ( vegan, vegetarian, glutenfree etc.). There are always vegan options and a good salad buffet. On the mexican night there was a vegetarian burrito on the menu. After talking to our waiter and then the sous chef, the sous chef showed me all vegan options and made me after a request a vegan burrito. The staff is really nice and helpful. When you tell them, that you‘re vegan they will help you.