It is a great video. I have never seen a 25' Lyman with that style windshield. I remember that all the larger Lymans from the 50's and 60's had wood framed windshields that I have seen or aluminum in the style of the wood ones. The bow is not like a Lyman as it does not show a center wood strip from windshield to bow but it could be a Chis Craft or Thompson too.
Some of the 16' lymans may have had after market curved windshields added. Downings in Alton had rental 16' boats that did not come with any windshield at all.
Lyman Archive web site:
http://www.clinkerbuilt.com/
Lyman Boats Web site:
http://www.lymanboat.com/
My dad had a 1959 19' Lyman inboard runabout from Downings