i also just upgraded 2 bq aquaris with ubuntu phone to ubports and all worked perfectly, the installer really is very good and friendly. the only improvement would be remove the not-working scopes, as it is a little confusing to have a scope in the list that do not work (remove the remote-scope.json or something like that in the /home/phablet/.cache fixed the issue)

i know this is old, but a good alternative is to use invidious, it is a alternative open source web frontend to youtube... and as it do not support ads, can't play them
https://redirect.invidious.io/