What camcorder does ariana grandes photographer use for her vhs looking type vids for her ig ?
Most likely, the video is shot in HD and processed to look "vintage". If it is actually shot with an old camcorder, the brand and model matter far less than that the thing is an old consumer unit. You can find them in thrift stores and maybe even relatives' closets.
Indeed probably shot on modern equipment and "antiqued" in post-production.