So I started off using a Canon T3i and still use it to this day. It’s definitely one of the best value DSLRs out there, but if you want to do really long form content (like commentary over gameplay) it might not be the best option because the firmware is set to limit video recording to around 12 minutes. Meaning every 12 minutes or so you have to re-enable video recording. (you can install a program on the camera called magic lantern that will automatically restart the video when it stops but it still leaves you with multiple files and about a second of drop-out every 12 minutes.)
Most (to my knowledge) DSLRs are going to be set this way due to trade tariffs, so I don’t know if I would suggest them if your aim is to do really long uninterupted videos.
Mirrorless cameras (I have my eyes set on Panasonic Lumix GH3 right now) and conventional video camcorders are better suited for that kind of stuff.
That being said, for shorter shoots (under 12 minutes) and photography, inexpensive DSLRs like the Canon T3i are one of the best values on the market.
I could talk about this stuff ALL DAY.