>1. Is it legal to record audio and video within my own home?
In PA, the answer revolves around whether or not the person uttering the communication has a reasonable expectation of privacy. So, it really depends on the facts of the conversation as it is being recorded. Example: a paid baby sitter talking to minor children in someone else's home probably has no reasonable expectation of privacy, because the baby sitter is carrying on a commercial activity. Conversely, that same baby sitter carrying on a private conversation with the same minor children while not not engaged in baby sitting probably does have such a privacy expectation -- as do the minor children, because it's their home. A conversation isn't private for only one side of the conversation -- it's either private or it's not.
So, it's a very close call.
>2. Is it necessary to inform other parties that they are
>being recorded?
The general rule is to provide clear and conspicuous notice that a person's communications will be recorded. That way there can be no misconception on the issue.