optimize checking dups in save video
mitigate unicode issue in jsonify

Exception: <type 'exceptions.UnicodeDecodeError'>
Traceback (most recent call last):
  File /base/data/home/apps/s~hebkhan/2013-11-10-85c0cb.371547243719943096/api/__init__.py, line 98, in api_errors_formatted
    return func(*args, **kwargs)
  File /base/data/home/apps/s~hebkhan/2013-11-10-85c0cb.371547243719943096/api/auth/decorators.py, line 110, in wrapper
    return func(*args, **kwargs)
  File /base/data/home/apps/s~hebkhan/2013-11-10-85c0cb.371547243719943096/api/decorators.py, line 99, in jsonp_enabled
    val = func(*args, **kwargs)
  File /base/data/home/apps/s~hebkhan/2013-11-10-85c0cb.371547243719943096/api/decorators.py, line 93, in jsonified
    return obj if isinstance(obj, basestring) else apijsonify.jsonify(obj, camel_cased=camel_cased)
  File /base/data/home/apps/s~hebkhan/2013-11-10-85c0cb.371547243719943096/api/jsonify.py, line 115, in jsonify
    cls=encoder)
  File /base/data/home/runtimes/python27/python27_dist/lib/python2.7/json/__init__.py, line 250, in dumps
    sort_keys=sort_keys, **kw).encode(obj)
  File /base/data/home/runtimes/python27/python27_dist/lib/python2.7/json/encoder.py, line 210, in encode
    return ''.join(chunks)
UnicodeDecodeError: 'ascii' codec can't decode byte 0xd7 in position 1: ordinal not in range(128)