Maybe. I find evidence that some DVR allow remote streaming through an H.264 protocol.
However, when I investigate a particular line, the Lorex Technology Security DVR, the ECO and EDGE lines, I could see that they had no documentation of any ability to access through anything other than their own software, which could imply that they use a custom encryption, or undocumented commands, or might use a bunch of javascript (which makes it a nuisance to access.) They could, in theory, even use a custom video protocol, but it is more probable that they use one of the well developed protocols, perhaps H.264, perhaps Motion JPEG. For whatever it is worth, the Lorex EDGE series looked to me to be more likely to support a useful remote access than the Lorex ECO series did.
These kinds of discussions become a lot easier when you start talking about particular models.
