I'd hazard a guess one of the drive belts is knackered or the tape is jamming.
https://www.fixya.com/support/t15817196-vcr_won_39_t_record_just_ejects_tape
https://www.techwalla.com/articles/how-to-repair-a-vcr-that-ejects-a-tape-immediately
Dfgxw, November 2021