As shown in Biden's own words in the video above, yes it was.
A private one, or a government-owned/operated one? (Hint, it was the second)
And even released the transcript, which shows he did nothing wrong.
Full transcript, not partial. Show me the words from the transcript that say he was doing what you claim.
Not in the slightest - he's looking for them to actually have a fair investigation. Their "subpoenas" don't mean jack-crap without full House approval, they have no enforcement authority without it. So, if they actually open an investigation, they'll have actual subpoena authority, which will then call for him to decide to comply or not.
You and I may be investigated, too. What's your point?