JVC HR-J737MS motor/belt problem?
 

Does anyone here can help me find if this is a belt or a motor issue?
When I insert a tape, sometime nothing happens or unit won't turn on, or play/ff/fw unless I give it a little push with my finger.

Video is on youtube because I can't upload here

https://www.youtube.com/watch?v=PO80iWkDFfI

also,
How are
Toshiba V-E59 with 6 head
Toshiba V-E40 with 4 head
compared to this JVC model? any good?
My only use is playing tapes without record. and transfer them to my pc using "AverMedia" device.
How their build quality?