Video tagging and XMP sidecar files

Hi all. I’ve just started to analyze if Bridge is the solution for my workflow but even if I've read hundreds of posts I didn't find the answer yet.

i would love to tag Pictures and Videos and in all the scenarios using XMP Sidecars. I've tried to tag some Videoclips and the metadata are stored in the file itself. How can I force Bridge to create a sidecar XMP file anytime I tag a photo or a videoclip? And of course keep that XMP file updated trough my tagging process? 
Thanks!