You can if you're jailbroken, but Bluetooth file transfer is becoming a thing of the past pretty quickly. There are better/faster ways to transfer any type of media/document that you want to an Android or iPhone from a stock iPhone. Why don't you just email, text or send them a DropBox link to your pictures?
Bluetooth is definitely not the best way to do that. It's slower in comparison to all other methods.
Here are a few better/faster options:
1. Sync them from the HTC to the computer and then sync them onto the iPhone in iTunes.
2. Put them in DropBox from the HTC and then open and save them from DropBox on the iPhone. You might already have a Google Drive account; it's very similar to DropBox and works the same.
3. Get them on the computer and then drag and drop them to the iPhone with an app like Air Sharing.
4. Email them (this is the worst option and won't work for big videos, but it's still better than Bluetooth).