Floor plan with room sizes on and good (not wide angle) photos are the most important imo, followed by a description that isn't too long or wordy but refers to any important features, ie, original fireplaces etc.
When we were looking to buy a rural property (in Wales, moving from England) in 2018, we would have appreciated a video and drone shots showing the land that came with the property. This was something our EA provided as standard for the village house we were selling, but no-one in Wales was offering this then. In fact, some EAs didn't even have a floor plan.
By the time we were selling the Welsh house in 2024, we were amazed that some local agents still didn't provide a floor plan at all! Those were immediately discounted.
Our photos were taken by a professional photographer used by the EA, the cost of these was included in the agent's fee. Initially we were told the EPC was an upfront cost, but were never asked to pay for this so assume it was added to the fee when the sale went through.
Re number of photos - I like to see at least one of every room plus several of the outside space(s). I'd rather see pics of hall/stairs/landing than pointless 'arty' shots. We once had an EA who also used a professional photographer, but the contract they had with them was to only supply EIGHT photos, regardless of the property size/price. Our home had five beds, three reception rooms, three bathrooms, utility, office and a vast kitchen plus 0.3 acre garden, so it was ridiculous to have so few pics. We insisted on supplying our own in addition.