There is an antenna socket on the left-hand side of the D-808 which works on SW and FM.
There is some evidence of overload using a yagi on FM. I'd imagine the overload will be worse in Spain.
An outdoor FM dipole might be a better choice.
The D-808 has poor selectivity on FM when compared to Tecsun DSP portables. The D-808 also has several birdies on FM.
RDS on the D-808 only works on strong signals. The audio in my video was good but no RDS was decoded.