add demo url

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
remove "support html5 video tag" string

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
support pasu call back function.

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
support all callback function.

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
update example callback.

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
fixed callback timmer.

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>