FFmpeg - add .mov video overlay looping on top of input video till the end -

so have 2 files.

c:\video_resized.mp4  c:\videooverlay.mov 

"c:\videooverlay.mov" needs go on top of "c:\video_resized.mp4" , @ same time needs loop until end of "c:\video_resized.mp4"

i tried use

"c:\ffmpeg\bin\ffmpeg.exe" -i "c:\video_resized.mp4" -i "c:\videooverlay.mov" -filter_complex "overlay=0:0" "c:\video_watermarked.mp4" 

that works fine adding overlay, have no idea on how have overlay looping until end of first video.