After viewing the video over and over, I have to agree with Pitchfork, that the deer is most likely a 4&1/2 year old buck. But unlike others I do not believe that he will become a 10pt. I believe that he will stay an 8 but put on more mass. I've studied bucks in the wild for years and only once have I seen a 4 year old put on additional points during their 5th & 6th year. So, let the arguments begin.
IME a lot depends on the herd when it comes to 4 yr old 8 points adding more typical points. Hill Country deer will add more than other regions due to over populations and habitat. I have seen quite a few that added points after 4. Seen a really nice typical 9 at 4 turn into a huge 5x6 typical with 3 extras and score around 200" at 5. Also had watched a buck that was an 8 point at 3 and 4 turn into a 5x5 typical at 5, 5x6 typical at 6 and 6x7 typical at 7 in Kendall County in the early 90's.
Good bucks. The first one could be 5 and second one is young, looks to be a 2 yr old.
uh oh, let the OP's second guessing begin...
Nothing wrong with letting those bucks go. I have seen many deer blow-up that in the right year. In the Hill Country I would try to get bucks to as old of an age as I could before shooting them ( on the ones you like). Lot of those deer are greatly influenced by rainfall due to over-population and poor habitat. You tend to see a lot more of what they refer to as "swing" deer there. Those are bucks that have the genetics and greatly influenced by rainfall or lack of it.