added same check on rijksvideo as in preprocess function.
added same check on bundle rijksvideo as in preprocess function. If you want to replace a file that is not rijksvideo it will show an error. It needs a check on media type
added same check on bundle rijksvideo as in preprocess function. If you want to replace a file that is not rijksvideo it will show an error. It needs a check on media type