...after firing katyushas into israel. it shows the idf following the motorcycle into a structure/house (many structures around it, one seems to be a mosque) when the idf blows up the structure. based on the force of the blast it was likely used as a missile storage facility... it's not a military base... the surrounding structures are most likely civilian.
"During the night IDF special navy forces operated in the area of Tyre against the terror infrastructure responsible for the launching of long-range rockets into Israel. During the activity forces killed a number of Hezbollah terrorists responsible for launching long range rockets into Israel, including the launching of the rockets which hit Hadera yesterday" (Source: IDF Website).